Multiple choice According to the 2011 census, the state with the lowest population in India is Bihar Gujarat Sikkim Tripura Reveal answer Fill a bubble to check yourself C Correct answer Explanation According to the 2011 census, Sikkim had the lowest population among Indian states with approximately 607,688 people. Sikkim became the 22nd state of India in 1975 and is the second-smallest state by population after some union territories.