Belle Plaine is a city in Benton County, Iowa, United States. The population was 2,534 at the 2010 census. It is part of the Cedar Rapids Metropolitan Statistical Area.
Belle Plaine was founded in 1862 when it was certain the railroad would be extended to that point. "Belle Plaine" is derived from the French meaning "beautiful plain".
Belle Plaine is located on both the historic Lincoln Highway and the cross country tracks of the Union Pacific Railroad.
According to the United States Census Bureau, the city has a total area of 3.23 square miles (8.37 km2), of which 3.22 square miles (8.34 km2) is land and 0.01 square miles (0.03 km2) is water.
The Iowa River flows roughly southeastward, just south of the city airport.
Iowa Highway 21 passes through Belle Plaine providing north to south travel from Waterloo to Hedrick and connections with both state and US east to west highways, U.S. Highway 30 north of town and Iowa Highway 212 south of town.
The railroad provides east to west freight service to the city.
The city airport is located on the south side of the town.
As of the census of 2010, there were 2,534 people, 1,101 households, and 659 families living in the city.