Finlayson is a city in Pine County, Minnesota, United States. The population was 315 at the 2010 census. The city's area was incorporated from Finlayson Township, the remainder of which is still adjacent to it.
Interstate 35 and Minnesota State Highways 18 and 23 are three of the main routes in the area.
According to the United States Census Bureau, the city has a total area of 2.9 square miles (7.6 km²), of which, 2.8 square miles (7.1 km²) of it is land and 0.2 square miles (0.4 km²) of it (5.82%) is water.