Viana do Alentejo is a municipality in the District of Évora in Portugal. The population in 2011 was 5,743, in an area of 393.67 km². The present …Viana do Alentejo is a municipality in the District of Évora in Portugal. The population in 2011 was 5,743, in an area of 393.67 km². The present Mayor is Bernardino Bengalinha Pinto, elected by the Socialist Party. The municipal holiday is January 13.