Joseph C. O'Mahoney Federal Center

United States Post Office and Court House
U.S. National Register of Historic Places
Location	2120 Capitol Ave., Cheyenne, Wyoming
Coordinates	41°08′15″N104°49′07″W / 41.13750°N 104.81861°W / 41.13750; -104.81861
Built	1965
Built by	J. W. Bateson Construction Co.
Architect	Porter & Porter, J. T. Banner & Associates
Architectural style	Modern Movement
MPS	Historic US Post Offices in Wyoming, 1900--1941, TR
NRHP reference No.	100001052 [1]
Added to NRHP	June 5, 2017

The United States Post Office and Court House in is a federal building located in Cheyenne, Wyoming, also called the Joseph C. O'Mahoney Federal Center it was listed on the National Register of Historic Places in 2017. ^[1]

By the 1960s federal agencies had outgrown the nearby 1932 Federal Office Building. In response plans were drafted for an eight-story office building and court house with attached post office. ^{[2] [3]} Construction began in 1963. Porter & Porter and J. T. Banner & Associates of Laramie were the architects. Construction was handled by the J. W. Bateson Construction Co. of Dallas, Texas. ^[4] The Modern Movement building was completed in 1965. The Post Office section is two stories. By 1973 the building was renamed in honor of Joseph C. O'Mahoney who represented Wyoming in the United States Senate from 1934-1953 and 1954-1961. ^[2]

References

1. "Weekly list" (PDF). National Park Service. Retrieved June 9, 2017.
2. "Joseph C. O'Mahoney Federal Center, Cheyenne, WY". U.S. General Services Administration. Retrieved August 13, 2025.
3. "Federal building, Cheyenne". Archived from the original on September 10, 2018.
4. "Jun 21, 1963, page 8 - Casper Morning Star at Newspapers.com". Newspapers.com. Retrieved August 13, 2025.