Old City Hall, also known as the Market House, is a historic city hall located at St. Charles, St. Charles County, Missouri.

It is a two-story, vernacular brick building on a rockfaced ashlar foundation.

It features segmental arched openings, pilasters, and a mansard roof.

[2]: 2–3 It was added to the National Register of Historic Places in 1980.

This article about a property in St. Charles County, Missouri on the National Register of Historic Places is a stub.