List of United States post offices in Wyoming

United States post offices operate under the authority of the United States Post Office Department (1792–1971) or the United States Postal Service (since 1971). Historically, post offices were usually placed in a prominent location. Many were architecturally distinctive, including notable buildings featuring Beaux-Arts, Art Deco, and Vernacular architecture.^[1]^[2] However, modern U.S. post offices were generally designed for functionality rather than architectural style.^[2]

Following is a list of United States post offices in Wyoming. Notable post offices include individual buildings, whether still in service or not, which have architectural, historical, or community-related significance. Many of these are listed on the National Register of Historic Places (NRHP) or state and local historic registers.

Post office	City	Date built	Architect	Notes	Ref.
Wyoming Mercantile	Aladdin	1896	Amos Robinson	^[a]^[b]	^[3]
United States Post Office (Basin, Wyoming)	Basin	1919	James A. Wetmore	^[a]	^[4]
Buffalo Main Post Office	Buffalo	1911	James A. Wetmore	^[a]	^[5]
Casper Federal Building (now Ewing T. Kerr Federal Building and U.S. Courthouse)	Casper	1932	James A. Wetmore	^[a]^[b]	^[6]
United States Post Office (Douglas, Wyoming)	Douglas	1909	Oscar Wenderoth	^[a]	^[7]^[8]
Evanston Main Post Office	Evanston	1905	James Knox Taylor	^[a]	^[9]^[10]
Gillette Post Office	Gillette	1935	Louis A. Simon	^[a]	^[11]
United States Post Office–Green River	Green River	1931	James A, Wetmore, Thomas C. Hyrum	^[a]	^[12]
United States Post Office (Greybull, Wyoming)	Greybull	1937	Louis A. Simon	^[a]	^[4]
Sussex Post Office and Store	Kaycee	1914	unknown	^[a]	^[5]
United States Post Office (Kemmerer, Wyoming)	Kemmerer	1934	Louis A. Simon	^[a]	^[13]
United States Post Office and Courthouse (Lander, Wyoming)	Lander	1907	James Knox Taylor	^[a]	^[14]
Yellowstone Main Post Office	Mammoth	1936	Louis A. Simon	^[a]	^[15]
United States Post Office (Newcastle, Wyoming)	Newcastle	1932	James A. Wetmore	^[a]	^[16]
United States Post Office (Powell, Wyoming)	Powell	1937	Louis A. Simon	^[a]	^[15]
First National Bank of Rock River	Rock River	1919	Southern Wyoming Lumber Company	^[a]^[b]	^[17]
Thermopolis Main Post Office	Thermopolis	1933	James A. Wetmore	^[a]	^[18]
United States Post Office (Torrington, Wyoming)	Torrington	1932	James A. Wetmore	^[a]	^[19]

Notes

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Listed on the National Register of Historic Places.
1 2 3 No longer used as a post office.

References

↑ "Historic Post Office Buildings". National Trust for Historic Preservation. Retrieved 2025-08-18.
1 2 Yuko, Elizabeth. "12 of the Most Beautiful Post Offices in the United States". Reader's Digest. Retrieved 2025-08-18.
↑ "Wyoming (WY), Crook County". National Register of Historic Places. Retrieved 2025-08-31.
1 2 "Wyoming (WY), Big Horn County". National Register of Historic Places. Retrieved 2025-08-31.
1 2 "Wyoming (WY), Johnson County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Wyoming (WY), Natrona County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Douglas Main Post Office". National Register of Historic Places. Wyoming State Preservation Office. 2008-10-24.
↑ "Wyoming (WY), Converse County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Evanston Main Post Office". National Register of Historic Places. Wyoming State Preservation Office. 2008-10-24.
↑ "Wyoming (WY), Uinta County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Wyoming (WY), Campbell County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Wyoming (WY), Sweetwater County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Wyoming (WY), Lincoln County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Wyoming (WY), Fremont County". National Register of Historic Places. Retrieved 2025-08-31.
1 2 "Wyoming (WY), Park County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Wyoming (WY), Weston County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Wyoming (WY), Albany County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Wyoming (WY), Hot Springs County". National Register of Historic Places. Retrieved 2025-08-31.
↑ "Wyoming (WY), Goshen County". National Register of Historic Places. Retrieved 2025-08-31.

[NRHP-3] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Listed on the National Register of Historic Places.

[Closed-4] 1 2 3 No longer used as a post office.

[1] "Historic Post Office Buildings". National Trust for Historic Preservation. Retrieved 2025-08-18.

[:02-2] 1 2 Yuko, Elizabeth. "12 of the Most Beautiful Post Offices in the United States". Reader's Digest. Retrieved 2025-08-18.

[5] "Wyoming (WY), Crook County". National Register of Historic Places. Retrieved 2025-08-31.

[:4-6] 1 2 "Wyoming (WY), Big Horn County". National Register of Historic Places. Retrieved 2025-08-31.

[:5-7] 1 2 "Wyoming (WY), Johnson County". National Register of Historic Places. Retrieved 2025-08-31.

[8] "Wyoming (WY), Natrona County". National Register of Historic Places. Retrieved 2025-08-31.

[9] "Douglas Main Post Office". National Register of Historic Places. Wyoming State Preservation Office. 2008-10-24.

[10] "Wyoming (WY), Converse County". National Register of Historic Places. Retrieved 2025-08-31.

[11] "Evanston Main Post Office". National Register of Historic Places. Wyoming State Preservation Office. 2008-10-24.

[12] "Wyoming (WY), Uinta County". National Register of Historic Places. Retrieved 2025-08-31.

[13] "Wyoming (WY), Campbell County". National Register of Historic Places. Retrieved 2025-08-31.

[14] "Wyoming (WY), Sweetwater County". National Register of Historic Places. Retrieved 2025-08-31.

[15] "Wyoming (WY), Lincoln County". National Register of Historic Places. Retrieved 2025-08-31.

[16] "Wyoming (WY), Fremont County". National Register of Historic Places. Retrieved 2025-08-31.

[:6-17] 1 2 "Wyoming (WY), Park County". National Register of Historic Places. Retrieved 2025-08-31.

[18] "Wyoming (WY), Weston County". National Register of Historic Places. Retrieved 2025-08-31.

[19] "Wyoming (WY), Albany County". National Register of Historic Places. Retrieved 2025-08-31.

[20] "Wyoming (WY), Hot Springs County". National Register of Historic Places. Retrieved 2025-08-31.

[21] "Wyoming (WY), Goshen County". National Register of Historic Places. Retrieved 2025-08-31.

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