Ansião (Portuguese pronunciation: [ɐ̃siˈɐ̃w] ⓘ) is a Portuguese municipality in the historical Beira Litoral province, in Central Region and district of Leiria. The population in 2011 was 13,128, in an area of 176.09 km2 (67.99 sq mi).

As of 2026,[update] the mayor is Jorge Humberto Fernandes Cancelinha, elected by the Social Democratic Party. The municipal holiday is Ascension Day.