The Little Sioux River Bridge is a historic structure located northwest of Spencer, Iowa, United States.

[2] The bridge was originally located at Main Street, south of downtown Spencer over the same river.

[2] A concrete arch span replaced this bridge in 1915, and it was moved to its current location the same year.

The concrete abutments were built by Thor Construction Company from Cedar Falls, Iowa.

This article about a property in Clay County, Iowa on the National Register of Historic Places is a stub.