The Central District of Babolsar County () is in Mazandaran province, Iran. Its capital is the city of Babolsar. The previous capital of the district was the village of Kalleh Bast (now the city of Hadishahr) in 1995.
At the time of the 2006 National Census, the district's population was 67,211 in 18,650 households. The following census in 2011 counted 72,046 people in 22,049 households. The 2016 census measured the population of the district as 80,561 inhabitants in 26,360 households.