| Official Name: | Virtsu |
| Pushpin Map: | Estonia |
| Mapsize: | 200px |
| Subdivision Type: | Country |
| Subdivision Name: | Estonia |
| Subdivision Type1: | County |
| Subdivision Name1: | Pärnu County |
| Subdivision Type2: | Parish |
| Subdivision Name2: | Lääneranna Parish |
| Population As Of: | 2011 Census |
| Population Total: | 539 |
| Timezone: | EET |
| Utc Offset: | +2 |
Virtsu is a small borough (Estonian: alevik) in Lääneranna Parish, Pärnu County, Estonia. It lies on the western coast of continental Estonia, and is a location of the main port for traffic to and from Saaremaa, the largest island of Estonia. The Virtsu ferry goes to Kuivastu, which is located on the island of Muhu, which is in turn connected to Saaremaa by the largest causeway in Estonia, the Väinatamm.
As of the 2011 Census, the settlement's population was 539.[1]
Puhtu peninsula, a former island, belongs to Virtsu.
Virtsu (referred to by earlier names Werder and Wirtsu) is described by English adventurer-writer Arthur Ransome in his nautical yarn Racundra's First Cruise.