国家邮政博物馆（National Postal Museum）是美国一座以邮政为展示主题的博物馆，位于华盛顿哥伦比亚特区、联合车站的对面。国家邮政博物馆由美国邮政署和史密森尼学会合作创建，于1993年开业。博物馆所在的建筑修建于1914年，曾经是华盛顿地区主要的邮局。博物馆收藏有许多有关美国邮政服务和世界各地邮政的展示品，并且还收集有众多邮票。2009年9月，博物馆收到财务管理专家威廉·格罗斯（William H. Gross）的800万美元捐助，为表纪念，博物馆以他的名字命名了一个邮票画廊。

The National Postal Museum, located opposite Union Station in Washington, D.C., USA, was established through joint agreement between the United States Postal Service and the Smithsonian Institution and opened in 1993. The museum is located across the street from Union Station, in the building that once served as the Main Post Office of Washington, D.C. from 1914, when it was constructed, until 1986. The building was designed by the Graham and Burnham architectural firm, which was led by Ernest Graham following the death of Daniel Burnham in 1912.