Pertteli (Finnish pronunciation: [ˈpertːeli]); Swedish: S:t Bertils) is a former municipality of Finland. It was consolidated with Salo on January 1, 2009.

It is located in the province of Western Finland and is part of the Southwest Finland region. The municipality had a population of 3,833 (2004-12-31) and covered an area of 156.08 km of which 1.93 km is water. The population density was 24.87 inhabitants per km. Inkere was the administrative center of Pertteli.

The municipality was unilingually Finnish.

Saint Bartholomew is the namesake of the municipality and is the subject of the heraldic shield.

Media related to Pertteli at Wikimedia Commons Pertteli travel guide from Wikivoyage

• http://www.pertteli.fi/ – Official website (in Finnish)

60°26′50″N 23°14′55″E / 60.44722°N 23.24861°E / 60.44722; 23.24861