Main Post Office
- Beaver Main Post Office
- Beverly Hills Main Post Office
- Bremen Main Post Office Building
- Buffalo Main Post Office
- Elko Main Post Office
- Evanston Main Post Office
- General Post Office, Belgrade
- Glendale Main Post Office
- Grand Post Office
- Lewiston Main Post Office
- Long Beach Main Post Office
- Main Post Office, Bydgoszcz
- Main Post Office, Kraków
- Miles City Main Post Office
- National Register of Historic Places listings in Alameda County, California
- National Register of Historic Places listings in Oconto County, Wisconsin
- New Brunswick Main Post Office
- Old Athens, Alabama Main Post Office
- Old Chicago Main Post Office
- Reno Main Post Office
- Thermopolis Main Post Office
- Tonopah Main Post Office
- U.S. Post Office-Peterborough Main
- United States Post Office (Basin, Wyoming)
- United States Post Office (Douglas, Wyoming)
- United States Post Office (Greenwich, Connecticut)
- United States Post Office (Greybull, Wyoming)
- United States Post Office (Newcastle, Wyoming)
- United States Post Office (Palm Beach, Florida)
- United States Post Office (Somersworth, New Hampshire)
- United States Post Office (Willows, California)
- United States Post Office (Yellowstone National Park)
- United States Post Office and Courthouse–Glasgow Main
- United States Post Office and Courthouse–Globe Main
- United States Post Office and Courthouse–Havre Main
- United States Post Office and Courthouse–Littleton Main
- United States Post Office and Courthouse–Prescott Main
- United States Post Office–Blackfoot Main
- United States Post Office–Meriden Main
- United States Post Office–New London Main
- United States Post Office–Stamford Main
- Winnemucca Main Post Office