 The municipality had a population of 1,572 (as of 1 January 2009) and covered an area of 261.01 km².Tõstamaa Parish covered part of the flat seashore of western Pärnu County, a low, swampy coastal area bordered by an elevated chain of sand dunes.Behind the dunes spreads a slightly wavy drumlin, where higher places have been reclaimed, but lower ones have remained swampy or meadowland and covered with scattered foliage.