Jainagar may refer to these places in India:
Jainagar (community development block), in the Koderma district, Jharkhand Jainagar, Koderma, a village in Jharkhand Jainagar, Bihar, a town in Madhubani district, Bihar Barauni–Gorakhpur, Raxaul and Jainagar lines, a set of the three railway lines in the Indian Railways Jainagar, Maharashtra, a town in Nandurbar district, Maharashtra Jainagar, Ramgarh, a census town in Ramgarh district, Jharkhand
See also Jaynagar (disambiguation) Jayanagar (disambiguation) Jai Nagarkatti, Indian-American chemist and businessman, served as the president of the Sigma Aldrich