Population development of Cologne

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This article shows the population development of Cologne in tabular and graphical form.

On December 31, 2016, the " official population " of Cologne was 1,075,935 according to the information and technology department of North Rhine- Westphalia (only main residences and after comparison with the other state offices ). Cologne has been a metropolis again since 2010 after crossing this line for a year in 1975. It is the fourth metropolis in Germany. As of December 31, 2017, the Office for Urban Development and Statistics of the City of Cologne reported a population of 1,084,795.

Population development

In 50 AD Colonia Claudia Ara Agrippinensium , an urban Roman settlement in the area of ​​Cologne, became the administrative capital of Lower Germany. The city had about 30,000 inhabitants at that time. After looting in the 3rd and 4th centuries (the Teutons conquered the city in 275, the Franks 355), the population fell to 15,000. In the High Middle Ages , Cologne gained in importance; alongside Paris, it was at times the most important city in continental Europe. In 1475 Cologne was raised to the status of a Free Imperial City . With around 40,000 inhabitants, it was the largest city in the Holy Roman Empire of the German nation .

During the early modern period , the population grew only slowly and fell again and again because of the numerous wars, epidemics and famine. In 1553 a terrible plague epidemic broke out in Cologne. On individual days 150, 200, 250 and more people died. By Michaelmas (September 29) there were 20,000 dead, by Christmas 25,000. With the beginning of industrialization in the 19th century, Cologne began to experience strong population growth. If the population of the city was around 40,000 in 1807, exactly as high as around 1430, it already exceeded the limit of 100,000 in 1852, making Cologne a major city .

After that, the population of Cologne rose relatively slowly compared to Munich (1880 = 230,000) or cities in the Ruhr area up to around 1880. The reason for this was the medieval fortification ring, which did not allow for greater growth. After its demolition in the 1880s, Cologne was able to make up some of the deficit. Between 1885 and 1895 the population doubled from 160,000 to 320,000 people. The incorporation of almost all suburbs on April 1, 1888 with a total of 85,000 inhabitants contributed to this.

The incorporation of the city of Kalk (1905 = 25,478 inhabitants) and the municipality of Vingst (1905 = 4,819 inhabitants) on April 1, 1910 brought an increase of around 34,000 people. With the incorporation of the suburbs of Mülheim am Rhein (1910 = 53,425 inhabitants) and Merheim (1910 = 23,604 inhabitants) on April 1, 1914, Cologne grew by 81,699 people. In the census of December 5, 1917, a total local population of 609,244 people was determined. According to the economics department of the War Food Office, these included 53,176 military personnel and 4,847 prisoners of war. On April 1, 1922, the mayor's office in Worringen (1919 = 7,034 inhabitants) came to Cologne.

The effects of the Second World War are clearly visible . Large parts of the city were destroyed by area bombing . On May 30, 1942, the first air raid with over 1000 bombers (" Operation Millennium ") was in which 469 people were killed. After a total of 262 air raids, 95 percent of the old town was destroyed by the end of the war. On March 6, 1945, American troops took the city. The population sank in the course of the war from 772,000 in May 1939 to 40,000 in March 1945. The return of the forced evacuees and the influx of refugees and displaced persons from the eastern German regions caused the population to rise rapidly. In 1959, as many people lived in the city as before the war.

In the 1970s, Cologne was briefly met with over a million inhabitants as a result of the incorporation of the “ Cologne Act ” , which was enacted specifically for this purpose : in the course of the last incorporation on January 1, 1975, the population reached one million - until 2012 more historic Peak. After the city of Wesseling was spun off again on July 1, 1976, the number of inhabitants again fell below the million mark. After falling to 914,336 residents in 1986, the city's population increased by 8.9 percent (81,084 people) by 2008. With 995,420 inhabitants, it was fourth among German cities and first within North Rhine-Westphalia. At the end of May 2010, the population then exceeded the million mark again at 1,000,298.

The following overview shows the number of inhabitants according to the respective territorial status. Up to 1807 these are mostly estimates, then census results (¹) or official updates by the city administration (until 1970) and the State Statistical Office (from 1971). From 1834 the information relates to the “customs clearance population”, from 1871 to the “local population”, from 1925 to the resident population and since 1987 to the “population at the place of the main residence”. Before 1834, the number of inhabitants was determined according to inconsistent survey methods.

From 50 to 1870

(respective territorial status)

Year / date Residents
50 30,000
250 15,000
350 15,000
1140 20,000
1430 40,000
1600 40,000
1714 42,015
1735 44,568
1794 44,512
1801 42,024
1807 40,400
1810 45,029
December 1, 1816 ¹ 49,276
December 1, 1819 ¹ 55,355
December 1, 1822 ¹ 56,527
date Residents
December 1, 1825 ¹ 59,049
December 1, 1828 ¹ 61,059
December 1, 1831 ¹ 65,953
December 3, 1834 ¹ 67,302
December 3, 1837 ¹ 72,237
December 3, 1840¹ 75,858
December 3, 1843 ¹ 83,418
December 3, 1846 ¹ 90.246
December 3, 1849 ¹ 94,789
December 3, 1852 ¹ 101.091
December 3, 1855 ¹ 106,852
December 3, 1858 ¹ 114,477
December 3, 1861 ¹ 120,568
December 3, 1864¹ 122.162
December 3, 1867 ¹ 125.172

¹ census result

From 1871 to 1939

(respective territorial status)

date Residents
December 1, 1871 ¹ 129,233
December 1, 1875 ¹ 135,371
December 1, 1880¹ 144,772
December 1, 1885 ¹ 161.401
December 1, 1890¹ 281,681
December 2, 1895 ¹ 321,564
December 1, 1900 ¹ 372.229
December 31, 1901 380,518
December 31, 1902 392,882
December 31, 1903 406.420
December 31, 1904 417,480
December 1, 1905 ¹ 428.722
December 31, 1906 440.376
December 31, 1907 451.134
December 31, 1908 461.891
December 31, 1909 472,649
date Residents
December 1, 1910¹ 516,527
December 31, 1911 525,671
December 31, 1912 538.302
December 31, 1913 550,540
December 31, 1914 642.848
December 1, 1916 ¹ 595.853
December 5, 1917 ¹ 609.244
October 8, 1919 ¹ 633.904
December 31, 1919 644.206
December 31, 1920 657.175
December 31, 1921 665.629
December 31, 1922 683.363
December 31, 1923 690.605
December 31, 1924 696.168
June 16, 1925 ¹ 700.222
December 31, 1925 705.477
date Residents
December 31, 1926 713,633
December 31, 1927 723.753
December 31, 1928 733.075
December 31, 1929 736.914
December 31, 1930 740.082
December 31, 1931 739.726
December 31, 1932 741.283
June 16, 1933 ¹ 756.605
December 31, 1933 759,648
December 31, 1934 760.422
December 31, 1935 761.263
December 31, 1936 762.154
December 31, 1937 765.468
December 31, 1938 767.102
May 17, 1939 ¹ 772.221
December 31, 1939 767.222

¹ census result

Source: City of Cologne

From 1939 to 1945

(respective territorial status)

The population supplied is shown (mean population). This includes normal consumers, partial and full self-caterers and group caterers, but not including foreigners in camp catering, civil internees, refugees and displaced persons in transit camps and day ticket recipients.

Year month Residents
1939 768,300
1940 733,500
1941 690,000
1942 648.200
1943 561,600
1944 472,900
January 1945 177,700
February 1945 152,000
March 1945 40,000
Year month Residents
April 1945 69,000
May 1945 138,500
June 1945 175,000
July 1945 250,000
August 1945 324,800
September 1945 359.200
October 1945 398,800
November 1945 423.200
December 1945 447,000

Source: Office for Urban Development and Statistics of the City of Cologne

The consumer group statistics of the Reich Statistical Office, which were prepared by the Federal Statistical Office and published in 1953, show a more precise process . According to the small consumer group statistics, the civilian population served in Cologne at the beginning of February 1943 comprised 643,634 people (including 20,122 group caterers), at the end of August that year 465,924 (including 31,901 group caterers), at the beginning of February 1944 again 498,029 (including 36,211 group caterers), and in mid-August 449,732 (including 35,525 Communal caterers) and in October / November 1944 454,825 people (including 35,748 communal caterers).

From 1945 to 1989

(respective territorial status)

date Residents
December 31, 1945 453,566
October 29, 1946 ¹ 491.380
December 31, 1946 494.815
December 31, 1947 515.355
December 31, 1948 543.765
December 31, 1949 573,557
September 13, 1950 ¹ 594.941
December 31, 1950 603.283
December 31, 1951 630,232
December 31, 1952 647,540
December 31, 1953 670.031
December 31, 1954 688.765
December 31, 1955 712,561
September 25, 1956 ¹ 713.505
December 31, 1956 718.722
December 31, 1957 737.991
December 31, 1958 756.203
date Residents
December 31, 1959 773.280
December 31, 1960 803.616
June 6, 1961 ¹ 809.247
December 31, 1961 816,542
December 31, 1962 827,659
December 31, 1963 835.832
December 31, 1964 842.061
December 31, 1965 854.479
December 31, 1966 860.200
December 31, 1967 854.717
December 31, 1968 855.886
December 31, 1969 864.754
May 27, 1970 ¹ 848.352
December 31, 1970 847.037
December 31, 1971 846.479
December 31, 1972 841,537
December 31, 1973 832.396
date Residents
December 31, 1974 825.792
December 31, 1975 1,013,771
December 31, 1976 981.021
December 31, 1977 976.761
December 31, 1978 976.534
December 31, 1979 976.136
December 31, 1980 976.694
December 31, 1981 971.403
December 31, 1982 961.777
December 31, 1983 940.663
December 31, 1984 922.286
December 31, 1985 916.153
December 31, 1986 914.336
May 25, 1987 ¹ 928.309
December 31, 1987 930.907
December 31, 1988 937.482
December 31, 1989 946.280

¹ census result

Sources: City of Cologne (until 1970), State Office for Information and Technology NRW (from 1971)

Since 1990

For the graphic representation of the time range, see the graphic in the Population forecast section

(respective territorial status)

date Residents
December 31, 1990 953.551
December 31, 1991 956.690
December 31, 1992 960.631
December 31, 1993 962.517
December 31, 1994 963.817
December 31, 1995 965.697
December 31, 1996 964.346
December 31, 1997 964.311
December 31, 1998 962.580
December 31, 1999 962.507
date Residents
December 31, 2000 962.884
December 31, 2001 967.940
December 31, 2002 968.639
December 31, 2003 965.954
December 31, 2004 969.709
December 31, 2005 983.347
December 31, 2006 989.766
December 31, 2007 995.397
December 31, 2008 995.420
December 31, 2009 998.105
date Residents
December 31, 2010 1,007,119
December 31, 2011 1,013,665
December 31, 2012 1,024,373
December 31 2013 1,034,175
December 31, 2014 1,046,680
December 31, 2015 1,060,582
December 31, 2016 1,075,935
December 31, 2017 1,080,394
December 31, 2018 1,085,664
December 31, 2019 1,087,863

Source: State Office for Information and Technology in North Rhine-Westphalia

Population forecast

Five prognoses of the population development according to the adjacent tables. Three forecasts by the Bertelsmann Foundation in green. The forecasts of the State Statistical Office in red. Blue shows the real development from 1990 to 2018

Bertelsmann Foundation forecast

In their 2009 publication “Who, where, how many? - Population in Germany 2025 ”, in which the Bertelsmann Foundation provides data on the development of the population for all municipalities with more than 5,000 inhabitants in Germany, an increase in Cologne's population of 5.8 percent (57,669 people) between 2006 and 2025 is predicted.

Absolute population development 2012–2030 - forecast for Cologne (main residences):

In 2011 there was a follow-up study that also predicted population growth, but a lower one.

Forecast 2009
date Residents
December 31, 2006 989.766
December 31, 2010 1.005.919
December 31, 2015 1,024,879
December 31, 2020 1,039,608
December 31, 2025 1,047,435
2011 forecast
date Residents
December 31, 2009 997.450
December 31, 2015 1,017,560
December 31, 2020 1,026,850
December 31, 2025 1,028,520
December 31, 2030 1,022,910
2015 forecast
date Residents
.
December 31, 2012 1,023,560
December 31, 2020 1,079,270
December 31, 2025 1,096,510
December 31, 2030 1,103,920

Source: Bertelsmann Foundation

Forecast by the State Statistical Office

On behalf of the State Chancellery of North Rhine-Westphalia, the State Office for Information and Technology in North Rhine-Westphalia (IT.NRW) carries out calculations on future population development in North Rhine-Westphalia. In the current model calculation of November 29, 2012 for the city of Cologne, the IT.NRW anticipates a greater increase in the number of inhabitants between 2005 and 2025 (the new model calculation now extends to 2030) than in the previous forecast.

Absolute population development 2005–2025 - forecast for Cologne (main residences):

Estimated increase from 2005 to 2025: 8.4 percent (81,861 people)

Absolute population development 2011-2030 - forecast for Cologne (main residences) from November 29, 2012:

Estimated increase from 2005 to 2025: 12.8 percent (124,191 people)

2005-2025
date Residents
January 1, 2005 969.709
January 1, 2010 990.373
January 1, 2015 1,011,872
January 1, 2020 1,033,679
January 1, 2025 1,051,570
date Residents
2011-2030
January 1, 2011 1.007.100
January 1, 2015 1,035,600
January 1, 2020 1,067,200
January 1, 2025 1,093,900
January 1, 2030 1,112,300

(Source: State Office Information and Technology NRW)

Population structure

population As of December 31, 2011
(before census adjustment)
Residents with main residence 1,017,155
of which male 492,416
Female 524,739
German 851.039
of which male 411.723
Female 439,316
Foreigners 166.116
of which male 80,693
Female 85,423
Proportion of foreigners in percent 16.3

Source: State Office for Information and Technology in North Rhine-Westphalia

Persons without German citizenship

rank Country Population
(December 31, 2012)
population

2017

1. Turkey 59,282 54,575
2. Italy 17,932 19,151
3. Poland 9,170 9,666
4th Serbia 7,995 5,947
5. Greece 5,632 5,741
6th Russia 4,385 4,721
7th Bulgaria 4.212 7,866
8th. Iraq 3.810 8,321
9. Ukraine 3,541 3,342
10. Iran 3,330 4,560
11. Spain 3,321 3,904
12. Portugal 3,155 3.163
13. Bosnia and Herzegovina 3,069 3,790
14th France 2,789 2,833
15th Croatia 2,647 3,459
16. Romania 2,631 4,741
17th Netherlands 2,291 2,423
18th Austria 2,278 2,286
19th United Kingdom 2,179 2,020
20th People's Republic of China 2.130 2.406

(Source: Office for Urban Development and Statistics of the City of Cologne.)

age structure

The following overview shows the development of the total population and the individual age groups from 1990 to 2007. All data are from December 31 of the respective year.

Age structure of Cologne - Teilbereich.svg
Graphic of the age structure for parts of the population in Cologne from 1990
year Total population Age: 0-14 Age: 15 to 64 Age: from 65
1990 953.551 129,434 13.57% 683.186 71.65% 140.931 14.78%
1991 956.690 131,481 13.74% 683.252 71.42% 141,957 14.84%
1992 960.631 133,529 13.90% 684.016 71.20% 143.086 14.90%
1993 962.517 135,088 14.03% 682.938 70.95% 144.491 15.01%
1994 963.817 136,312 14.14% 681.779 70.74% 145.726 15.12%
1995 963.817 136,591 14.17% 680.165 70.57% 147.061 15.26%
1996 964.346 136,745 14.18% 679.851 70.50% 147,750 15.32%
1997 964.311 137.140 14.22% 679.066 70.42% 148.105 15.36%
1998 962.580 136,789 14.21% 677.376 70.37% 148.415 15.42%
1999 962.507 137.026 14.24% 674,526 70.08% 150.955 15.68%
2000 962.884 137.147 14.24% 671.904 69.78% 153,833 15.98%
2001 967.940 137.294 14.18% 672.886 69.52% 157.760 16.30%
2002 968.639 136.136 14.05% 671,433 69.32% 161.070 16.63%
2003 965.954 134,456 13.92% 666,952 69.05% 164,546 17.03%
2004 969.709 132,670 13.68% 667,828 68.87% 169.211 17.45%
2005 983.347 130.909 13.31% 678.013 68.95% 174,425 17.74%
2006 989.766 129.997 13.13% 681.255 68.83% 178,514 18.04%
2007 995.397 129,748 13.03% 684.917 68.81% 180.732 18.16%
2008 995.420 129.991 13.06% 683.039 68.62% 182,390 18.32%
2009 998.105 130,751 13.10% 683.680 68.50% 183,674 18.40%
2010 1,007,119 132,561 13.16% 691.159 68.63% 183,399 18.21%
2011 1,013,665 133,380 13.16% 700.039 69.06% 180.246 17.78%
2012 1,024,373 134,300 13.11% 708.495 69.16% 181,578 17.73%
2013 1,034,175 135,595 13.11% 715.751 69.21% 182,829 17.68%
2014 1,046,680 137,660 13.15% 724.417 69.21% 184,603 17.64%
2015 1,060,582 141.199 13.31% 733.460 69.16% 185.923 17.53%
2016 1,075,935 145.484 13.52% 743,349 69.09% 187.102 17.39%
2017 1,080,394 146.924 13.60% 745.413 68.99% 188.057 17.41%
2018 1,085,664 148,578 13.69% 748.716 68.96% 188,370 17.35%
2019 1,087,863 148.740 13.67% 749.702 68.92% 189,421 17.41%

Source: State Office for Information and Technology in North Rhine-Westphalia

City structure

The city of Cologne is divided into 86 districts, which are combined into nine districts. As of December 31, 2017, 684,445 of the 1,084,795 Cologne residents lived in the left bank of the Rhine and 400,350 in the right bank of the city.

Townships

The population figures refer to December 31, 2007 (main and secondary residences).

No. Surname of inhabitants
number

Number of foreigners
Foreigners
in%
1 Downtown 128,758 22,763 17.7
2 Rodenkirchen 101,420 14,585 14.4
3 Lindenthal 138,987 14,455 10.4
4th Ehrenfeld 103,890 20,560 19.8
5 Trinkets 110.138 20,463 18.6
6th Chorweiler 81,762 15,279 18.7
7th Porz 106,894 15,424 14.4
8th lime 108,620 27.051 24.9
9 Mülheim 144,625 27.173 18.8
Cologne 1,025,094 177.753 17.3

Source: Office for Urban Development and Statistics of the City of Cologne

Districts

The population figures refer to December 31, 2007 (main and secondary residences).

No. Surname of inhabitants
number

Number of foreigners
Foreigners
in%
101 Altstadt-Süd 27,630 5,325 19.3
102 Neustadt-Süd 37,985 6.174 16.3
103 Old town north 18,520 4,247 22.9
104 Neustadt-North 28,853 4,732 16.4
105 Deutz 15,770 2,285 14.5
201 Bayenthal 8,433 1,279 15.2
202 Marienburg 5,651 809 14.3
203 Raderberg 5,684 1.011 17.8
204 Raderthal 4,701 459 9.8
205 Folding rule 20,808 3,049 14.7
206 Rondorf 9,646 783 8.1
207 Hahnwald 2.116 238 11.2
208 Rodenkirchen 16.051 1,808 11.3
209 White 5,715 444 7.8
210 Sürth 10,209 900 8.8
211 Godorf 2,357 404 17.1
212 Immendorf 2,060 194 9.4
213 Meschenich 7,989 3,207 40.1
301 Klettenberg 10.170 796 7.8
302 Sülz 36,120 3,793 10.5
303 Lindenthal 29,811 2,941 9.9
304 Braunsfeld 10,656 1,173 11.0
305 Müngersdorf 8,339 1,327 15.9
306 Junkersdorf 12,451 1,356 10.9
307 Pastures 16,337 1,968 12.0
308 Lövenich 8,268 545 6.6
309 Widdersdorf 6,835 556 8.1
401 Ehrenfeld 35,407 8.205 23.2
402 Neuehrenfeld 23,403 3,647 15.6
403 Bickendorf 16,273 3,631 22.3
404 Vogelsang 8,151 1,024 12.6
405 Bocklemünd / Mengenich 10,796 2,077 19.2
406 Ossendorf 9,860 1,976 20.0
501 Trinkets 33,130 6,400 19.3
502 Mauenheim 5,691 930 16.3
503 Riehl 11,449 1,648 14.4
504 Niehl 17,610 3,720 21.1
505 Weidenpesch 13,481 2,606 19.3
506 Longerich 13,767 1,386 10.1
507 Picture sticks 15,010 3,773 25.1
601 I remember 5,713 699 12.2
602 Feeling 2,098 117 5.6
603 Seeberg 11,556 3,581 31.0
604 Heimersdorf 5,997 457 7.6
605 Lindweiler 3,591 538 15.0
606 Pesch 7,748 544 7.0
607 Esch / Auweiler 6,516 392 6.0
608 Volkhoven / hamlet 6.008 1,170 19.5
609 Chorweiler 13,418 5,061 37.7
610 Blumenberg 5,900 1,174 19.9
611 Roggendorf / Thenhoven 3,898 552 14.2
612 Worringen 9,319 994 10.7
701 Poll 10,978 1,398 12.7
702 Westhoven 4,639 473 10.2
703 Ensen 6,876 888 12.9
704 Gremberghoven 2,977 1,132 38.0
705 Hurry 8,946 1,099 12.3
706 Porz 13,291 2,652 20.0
707 Urbach 11,966 1,539 12.9
708 Elsdorf 1,278 80 6.3
709 Grengel 5,282 627 11.9
710 Delusional heather 7,831 802 10.2
711 Delusion 6.277 722 11.5
712 Lind 3,394 323 9.5
713 Libur 1.002 32 3.2
714 Zündorf 12.303 1,175 9.6
715 Langel 3,222 115 3.6
716 Finkenberg 6,632 2,367 35.7
801 Humboldt / Gremberg 15,036 4,589 30.5
802 lime 21,796 8,262 37.9
803 Vingst 10,991 3,195 29.1
804 Höhenberg 11,924 3,708 31.1
805 Ostheim 10,690 2,904 27.2
806 Merheim 8,721 1,352 15.5
807 Bridge 9,641 615 6.4
808 Rath / Heumar 11,025 724 6.6
809 Neubrück 8,796 1,702 19.3
901 Mülheim 40,916 12,202 29.8
902 Book forest 7,261 1,877 25.9
903 Buchheim 11,983 2,763 23.1
904 Wood willow 20,768 3,378 16.3
905 Dellbrück 21,130 1,692 8.0
906 Höhenhaus 15,345 1,692 11.0
907 Thin forest 11,874 1,617 13.6
908 Stammheim 7,531 1,017 13.5
909 Flittard 7,817 935 12.0
Cologne 1,025,094 177.753 17.3

Source: Office for Urban Development and Statistics of the City of Cologne

See also

literature

  • Karl Friedrich Wilhelm Dieterici (ed.): Communications from the Statistical Bureau in Berlin , 1848–1861
  • Imperial Statistical Office (Ed.): Statistical Yearbook for the German Empire , 1880–1918
  • Statistisches Reichsamt (Ed.): Statistical yearbook for the German Reich , 1919–1941 / 42
  • German Association of Cities (Ed.): Statistical Yearbook of German Communities , 1890 ff.
  • Federal Statistical Office (Ed.): Statistical Yearbook for the Federal Republic of Germany , 1952 ff.
  • Statistical Office of the City of Cologne (Ed.): Statistical Yearbook of the City of Cologne , 1911 ff.
  • Bertelsmann Foundation (ed.): Who, where, how many? - Population in Germany 2025. Practical knowledge for municipalities. Bertelsmann Stiftung publishing house, Gütersloh 2009, ISBN 978-3-86793-042-0

Individual evidence

  1. IT.NRW: Population figures in the Cologne administrative district ( Memento of the original from July 29, 2014 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.it.nrw.de
  2. ^ City of Cologne: Cologne figures table
  3. Cologne is a metropolis of millions ( Memento of the original from May 22, 2008 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Press releases from the State Statistical Office of North Rhine-Westphalia from September 27, 2010 (accessed on September 27, 2010) @1@ 2Template: Webachiv / IABot / www.it.nrw.de
  4. Federal Statistical Office (Ed.): Statistical Reports, Work No. VIII / 19/1, The civilian population of the German Empire 1940–1945. Results of the consumer group statistics. Wiesbaden 1953, p. 31
  5. ^ Bertelsmann Foundation: Population forecast
  6. Statistical Yearbook Cologne 2013 . City Cologne. Retrieved on April 9, 2015. Statistical Yearbook Cologne 2018. City of Cologne. Retrieved July 25, 2020
  7. a b City of Cologne: Numbers and Statistics

Web links

Commons : Temporal population graphs of Cologne  - Collection of images, videos and audio files