| Official Name: | Varstu |
| Pushpin Map: | Estonia |
| Mapsize: | 200px |
| Subdivision Type: | Country |
| Subdivision Name: | Estonia |
| Subdivision Type1: | County |
| Subdivision Name1: | Võru County |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Rõuge Parish |
| Timezone: | EET |
| Utc Offset: | +2 |
Varstu is a small borough (Estonian: alevik) in Rõuge Parish, Võru County in southeastern Estonia. Between 1991 and 2017 (until the administrative reform of Estonian municipalities) the it was the administrative centre of Varstu Parish.[1]
Varstu is the birthplace of historian Vello Helk (1923–2014).