The Belle Plaine Main Street Historic District is a nationally recognized historic district located in Belle Plaine, Iowa, United States.

The Chicago & North Western Railroad was extended from Cedar Rapids the following year.

They include the Sankot Motor Company (c. 1910), which is individually listed on the National Register.

Also included in the district are the Pythian Castle (1895), Masonic Temple (1895), Odd Fellows Building (1906), two theaters, the former Hart Memorial Library (1931), the Chicago & North Western Railroad Depot and Freight House (1894), and the section of the tracks adjacent to the depot.

The Classical Revival and the Early Commercial architectural styles are dominant.