|Nearest city||Watertown, South Dakota|
|NRHP reference #||76001725|
|Added to NRHP||13 August 1976|
The Mellette House is a historic home and museum located at 421 Fifth Avenue Northwest in Watertown, South Dakota. It is the former residence of the first governor of South Dakota, Arthur C. Mellette.
The Mellette family built the house in 1885 on Prospect Hill (now Mellette Hill) and lived there until 1895. It was the location of Watertown's first radio station in 1929. When the house was condemned in 1943, a group purchased the property and formed the Mellette Memorial Association to restore and preserve it. The house was added to the National Register of Historic Places in 1976. 
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