| Ylistaro | |
| Official Name: | Finnish: Ylistaron kunta Swedish: Ylistaro 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: | Southern Ostrobothnia |
| Subdivision Type3: | Sub-region |
| Subdivision Name3: | Seinäjoki |
| Extinct Title: | Merged with Seinäjoki |
| Extinct Date: | January 1, 2009 |
| Leader Title: | City manager |
| Unit Pref: | Metric |
| Area Total Km2: | 484.08 |
| Area Land Km2: | 481.35 |
| Area Water Km2: | 2.73 |
| Population Total: | 5582 |
| Population As Of: | 2003 |
| Population Density Km2: | auto |
| Blank Name: | Official languages |
| Blank Info: | Finnish |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
Ylistaro is a former municipality of Finland. It was consolidated, together with Nurmo to Seinäjoki on 1 January 2009.
It is located in the province of Western Finland and is part of the Southern Ostrobothnia region. The municipality had a population of 5,582 (2003) and covered an area of 484.08 km2 of which 2.73 km2 is water. The population density was 11.6 inhabitants per km2.
The municipality was unilingually Finnish.
In May 2007 it was agreed that Ylistaro would merge with the city of Seinäjoki and the neighbouring municipality of Nurmo; so from 2009 Ylistaro ended its independent existence.