Fronteira, Portugal

Fronteira () is a municipality in Portalegre District in Portugal. The population in 2011 was 3,410, in an area of 248.60 km².
The present Mayor is Rogério David Sádio da Silva, elected by the Social Democratic Party. The municipal holiday is April 6.
Parishes.
Administratively, the municipality is divided into 3 civil parishes ("freguesias"):