Jainagar, Bihar

{{Infobox settlement | name = Jainagar | other_name = Jaynagar | settlement_type = Town | image_skyline = Jaynagar Railway station IMG 20150430 101317.jpg | image_caption = Railway Station in Jainagar | pushpin_map = India Bihar | pushpin_map_caption = Location in Bihar | coordinates = 26°35′33″N 86°08′14″E | subdivision_type = Country | subdivision_name = India | subdivision_type1 = State | subdivision_name1 = Bihar | subdivision_type2 = District | subdivision_name2 = Madhubani | government_type = | governing_body = | unit_pref = Metric | area_total_km2 = | elevation_m = | population_total = 21,782 | population_as_of = 2011 | population_density_km2 = auto | demographics_type1 = Languages | demographics1_title1 = Official | demographics1_info1 = Maithili, Hindi | timezone1 = IST | utc_offset1 = +5:30 | postal_code_type = PIN | postal_code = 847226 | area_code = 06246 | area_code_type = Telephone code | blank1_name_sec1 = Lok Sabha constituency | blank1_info_sec1 = Jhanjharpur | blank2_name_sec1 = Vidhan Sabha constituency | blank2_info_sec1 = Khajauli | website = {{URL|http://madhubani.nic. Jaynagar (also spelled as Jaynagar) is a town and a notified area of Madhubani district in the Indian state of Bihar.It is also near to Nepal border.

As of 2011 India census, Jainagar had a total population of 21,782. Males constitute 51% of the population and females 49%. Jainagar has an average literacy rate of 79%, higher than the national average of 74.04%. Male literacy is 86%, and female literacy is 71%. 16% of the population is under 60 years of age.