Ansião (Portuguese pronunciation: [ɐ̃siˈɐ̃w]), is a municipality in Leiria District in Portugal. The population in 2011 was 13,128, in an area of 176.09 km².
The present Mayor is Fernando Ribeiro Marques, elected by the Social Democratic Party. The municipal holiday is the Ascension on May 25.
Administratively, the municipality is divided into 6 civil parishes (freguesias):
- Chão de Couce
- Santiago da Guarda