Watertown Commercial Historic District (Watertown, South Dakota)

The Watertown Commercial Historic District is a 22 acre historic district in Watertown, South Dakota. It is roughly bounded by First Ave. N., Third St. E., Second Ave. S., and First St. W.

It includes works by Watertown architect Maurice A. Hockman.

It includes 69 contributing buildings and 47 non-contributing ones.

It includes the Codington County Courthouse and the Carnegie Free Public Library, which are separately listed on the National Register.