Pöytyä (Finnish pronunciation: [ˈpøy̯tyæ]; Swedish: Pöytyä, also Pöytis) is a municipality of Finland located in the Southwest Finland region.
The municipality has a population of 7,903 (31 December 2025) and covers an area of 773.69 square kilometres (298.72 sq mi) of which 23.68 km2 (9.14 sq mi) is water. The population density is 10.54 inhabitants per square kilometre (27.3/sq mi). The municipality is unilingually Finnish.
The neighbouring municipality of Karinainen was merged into Pöytyä in the beginning of 2005. The neighbouring municipality of Yläne was merged into Pöytyä in the beginning of 2009.
Pöytyä's neighbouring municipalities are Aura, Eura, Lieto, Loimaa, Marttila, Mynämäki, Oripää and Säkylä.