Alastaro

Alastaro is a former municipality of Finland. It was merged into the town of Loimaa on 1 January 2009.

Alastaro 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 258.12 km2 of which 1.32 km² is water. The population density was 11.33 inhabitants per km².

The municipality was unilingually Finnish.

The Alastaro Circuit opened in 1990.