The Central District of Lahijan County () is in northwestern Iran's Gilan province. Its capital is the city of Lahijan.
At the 2006 National Census, the district's population was 130,288 in 38,766 households. The census in 2011 recorded 143,478 people in 46,681 households, while the 2016 census reported the population of the district as 144,292 inhabitants in 49,729 households.