Mellilä (Finnish pronunciation: [ˈmelːilæ]) is a former municipality of Finland. It was merged to the town of Loimaa on 1 January 2009.

It is located in the province of Western Finland and is part of the Southwest Finland region. The municipality had a population of 1,255 (2004-12-31) and covered an area of 110.62 km of which 0.10 km is water. The population density was 11.35 inhabitants per km.

The municipality was unilingually Finnish.

• 
  Mellilä's church
• 
  Eksyssuo
• 
  Niinijoki

Media related to Mellilä at Wikimedia Commons

• Mellilän kyläyhdistys ry (in Finnish)

60°46′45″N 22°55′30″E / 60.77917°N 22.92500°E / 60.77917; 22.92500