United States Post Office–South Norwalk Main

The US Post Office–South Norwalk Main, also known as Norwalk Main Post Office, is located at 16 Washington Street in Norwalk, Connecticut. It is a single story steel and concrete structure, faced in limestone. It was designed in 1936 and built in 1937, and is an example of what has been termed "starved classicism". Its lobby areas are decorated by murals by Kindred McLeary, commissioned by the Treasury Department's Section of Painting and Sculpture.

The building was listed on the National Register of Historic Places in 1986.