Laporte is a borough and the county seat of Sullivan County, Pennsylvania, United States. The population was 320 at the 2020 census. It is the county seat of Sullivan County. Laporte is surrounded by Laporte Township. It was named for John Laporte. It is the smallest county seat in Pennsylvania by population, and in 1969 was one of the two smallest in the United States.

Sullivan County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 5,840, making it the second-least populous county in Pennsylvania. Its county seat is Laporte. The county was created on March 15, 1847, from part of Lycoming County and named for Major General John Sullivan. The county is part of the Northeast Pennsylvania region of the state.