| Mellilä | |
| Official Name: | Finnish: Mellilän kunta Swedish: Mellilä kommun |
| Settlement Type: | Former municipality |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location within Finland |
| Subdivision Type: | Country |
| Subdivision Name: | Finland |
| Subdivision Type1: | Province |
| Subdivision Name1: | Western Finland |
| Subdivision Type2: | Region |
| Subdivision Name2: | Southwest Finland |
| Subdivision Type3: | Sub-region |
| Subdivision Name3: | Loimaa |
| Extinct Title: | Merged with Loimaa |
| Extinct Date: | January 1, 2009 |
| Leader Title: | City manager |
| Leader Name: | Esko Rautiainen |
| Unit Pref: | Metric |
| Area Total Km2: | 110.62 |
| Area Land Km2: | 110.52 |
| Area Water Km2: | 0.1 |
| Area Rank: | 387th |
| Population Total: | 1252 |
| Population As Of: | 2003 |
| Population Rank: | 401st |
| Population Density Km2: | auto |
| Population Note: | +2.4 % change |
| Blank Name: | Official languages |
| Blank Info: | Finnish |
| Blank1 Name: | Urbanisation |
| Blank1 Info: | 44.5% |
| Blank2 Name: | Unemployment rate |
| Blank2 Info: | 9.2% |
| Blank3 Name: | Climate |
| Blank3 Info: | Dfc |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
Mellilä (in Finnish pronounced as /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 km2 of which 0.10 km2 is water. The population density was 11.35 inhabitants per km2.
The municipality was unilingually Finnish.