It is located at 25°30′N 86°29′E / 25.5°N 86.48°E / 25.5; 86.48 and has an average elevation of 36 metres (118 feet).

The Khagaria Junction railway station serves the town.

According to the 2011 India census, Khagaria nagar parishad had a population of 49,406, of which 26,594 were males and 22,812 were females.

Population of children in the age group of 0 to 6 years was 7,273.

[1] As of 2001[update] India census, Khagaria had a population of 45,126.