Lamont is an unincorporated community and census-designated place (CDP) in Jefferson County, Florida, United States.

[4] It is bordered to the east by the Aucilla River, which forms the Madison County line.

Tallahassee, the state capital, is 29 miles (47 km) west of Lamont via US-27, while Monticello, the Jefferson county seat, is 16 miles (26 km) northwest of Lamont via US-19.

According to the U.S. Census Bureau, the Lamont CDP has an area of 2.4 square miles (6.1 km2), all of it recorded as land.

The Aucilla River, which runs along the eastern edge of the community, is a direct tributary of the Gulf of Mexico 25 miles (40 km) to the south.