Rymättylä (Finnish pronunciation: [ˈrymætːylæ]; Swedish: Rimito) is a former municipality of Finland. It was, together with Merimasku and Velkua, consolidated with the town of Naantali 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 2,165 (2008-12-31) and covered an area of 150.11 km of which 3.66 km is water. The population density was 13.65 inhabitants per km.

The municipality was unilingually Finnish.

• Official website (in Finnish)

60°22′35″N 021°56′30″E / 60.37639°N 21.94167°E / 60.37639; 21.94167