United States Customhouse and Post Office

The U.S. Custom House and Post Office is a court house at 815 Olive Street in downtown St. Louis, Missouri.

It was designed by architects Alfred B. Mullett, William Appleton Potter, and James G. Hill, and was constructed between 1873 and 1884. Located at the intersection of Eighth and Olive Streets, it is one of four surviving Federal office buildings designed by Mullett. The others are the Eisenhower Executive Office Building in Washington, D.C., the Century Post Office in Raleigh, N.C. and the U.S. Custom House in Portland, Me. It is in the Second Empire architectural style popular in the post Civil-War era. Mullett's other Second Empire buildings in Boston, Cincinnati, New York City and Philadelphia have been demolished.