Texas State Highway 80

State Highway 80
Route information
Maintained by TxDOT
Length	86.312 mi (138.906 km)
Existed	1923–present
Major junctions
South end	SH 123 at Karnes City
Major intersections	US 87 at Nixon US 90 Alt. at Belmont I-10 near Luling US 90 / US 183 in Luling SH 130 Toll near Fentress I-35 in San Marcos
North end	RM 12 near San Marcos
Location
Country	United States
State	Texas
Highway system
Highways in Texas Interstate US State Toll Loops Spurs FM/RM Park Rec
← SH 79 → SH 81

State Highway 80 (SH 80) is a state highway in the U.S. state of Texas that runs 83 miles (134 km) from Karnes City to San Marcos.

History

The original highway was designated on August 21, 1923 from San Marcos to Luling, replacing most of SH 29A (the rest of SH 29A was cancelled). On October 12, 1925, SH 80 extended to Wimberley, but this did not take effect until January 1, 1926. On April 6, 1932, SH 80 had a planned extension south to Nixon designated. On July 17, 1934, it was rerouted to end in Refugio over part of SH 29. This change was undone on January 19, 1935. On September 22, 1936, SH 80 extended to Karnes City, replacing a portion of SH 112. On September 26, 1939, SH 80 extended southwest to the Atascosa/Karnes County Line, replacing SH 312. On February 20, 1940, the section from Karnes City to the Atascosa/Karnes County Line was cancelled. On March 26, 1942, the section from Wimberley to San Marcos was transferred to Ranch to Market Road 12. On December 4, 1952, SH 80 extended over old US 181 to new US 181. On June 21, 1990, this extension was cancelled, as it became part of Business US 181. On June 24, 2010, RM 12 was shifted to an alignment south of San Marcos, and the SH 80 designation was extended through the city to a terminus with RM 12 west of the city. On January 26, 2017, the section of SH 80 from RM 12 to Loop 82 was removed from the state highway system and was given to the city of San Marcos.

Major intersections

County	Location	mi	km	Destinations	Notes
Karnes	Karnes City	0.0– 1.5	0.0– 2.4	Bus. US 181 (E. Calvert Ave.) / SH 123 south (S. Badger Dr.) – Kenedy	Southern terminus; south end of SH 123 concurrency
		2.1	3.4	SH 123 north (N. Badger Dr.) – Stockdale	North end of SH 123 concurrency
	​	6.8	10.9	FM 792
	Helena	8.2	13.2	FM 81 – Runge
	​	11.9	19.2	FM 1354
	​	15.1	24.3	FM 627 – Ecleto
	Gillett	20.7	33.3	Spur 190 to FM 887
		20.9	33.6	SH 119 – Stockdale, Yorktown
Wilson	No major junctions
Gonzales	Nixon	31.1	50.1	US 87 / SH 97 south (Central Ave.) – Stockdale, Cuero	South end of SH 97 concurrency
		31.2	50.2	FM 1681
	Leesville	33.2	53.4	FM 1117 north – Seguin
		35.2	56.6	SH 97 north – Gonzales	North end of SH 97 concurrency
		45.9	73.9	FM 1682
		52.8	85.0	FM 466 east – Cost
	Belmont	52.8	85.0	FM 466 west – Seguin
		55.0	88.5	US 90 Alt. – Seguin, Gonzales
Guadalupe	​	63.8	102.7	FM 1150
	Luling	65.0– 65.1	104.6– 104.8	I-10 – San Antonio, Houston	I-10 exit 628.
Caldwell		67.3	108.3	US 90 / US 183 south (E. Pierce St.)	South end of US 183 concurrency
		67.5	108.6	US 183 north (N. Magnolia Ave.)	North end of US 183 concurrency
	Stairtown	73.0	117.5	FM 671
	Fentress	77.0	123.9	FM 20
	​			SH 130 Toll – Seguin, Austin
	​			FM 1977
	​			FM 1979
	Martindale			SH 142 east – Lockhart	South end of SH 142 concurrency
				FM 1984
Hays	San Marcos			SH 21 east (Airport Hwy.) – Bastrop	South end of SH 21 concurrency
				I-35 – San Antonio, Austin	I-35 exit 205; north end of SH 21/SH 142 concurrency.
				Loop 82 north (N. LBJ Dr.)
				Loop 82 south (N. Guadalupe St.)
				FM 2439 (W. Hopkins St.)
	​			RM 12 – Wimberley	Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus