The Basin Main Post Office in Basin, Wyoming was built in 1919 as part of a facilities improvement program by the United States Post Office Department. The post office in Basin was nominated to the National Register of Historic Places as part of a thematic study comprising twelve Wyoming post offices built to standardized USPO plans in the early twentieth century.

• Basin Republican-Rustler Printing Building
• National Register of Historic Places listings in Big Horn County, Wyoming

• Photographs of the Basin Post Office at the National Park Service's NRHP database
• Basin Main Post Office at the Wyoming State Historic Preservation Office