Clermont is a city in Fayette County, Iowa, United States. The population was 716 at the 2000 census. Clermont is home to Montauk, the mansion of former Iowa governor William Larrabee, along with much historic architecture. Scenes for the movie The Straight Story were filmed here. Clermont is located at 42°59′58″N 91°39′17″W / 42.99944°N 91.65472°W / 42.99944; -91.65472 (42.999339, -91.654699) on the Turkey River. According to the United States Census Bureau, the city has a total area of 1.1 square miles (2.8 km²), all of it land.