Alastaro

Alastaro () is a former municipality of Finland. It was merged into the town of Loimaa on 1 January 2009.
It is located in the province of Southern Finland and is part of the Southwest Finland region. The municipality had a population of 2,910 (31 December 2008) and covered an area of of which 1.32 km² is water. The population density was 11.33 inhabitants per km².
The municipality was unilingually Finnish.