Viro may refer to:
- People
- Viro Small, African American wrestler
- Oleg Viro (born 1948), Russian mathematician
- Catholicos Viro (d. 630), the leader of Caucasian Albanian Church in the early 7th century
- Places
- Estonia (Viro in the Finnish language)
- Porto Viro, an Italian municipality
- Viro, Estonia, a village in Setomaa Parish, Võru County, Estonia
- Other uses
- Viro (company), a Croatian sugar company
- Viro (Elemental Gelade), fictional character the manga series Elemental Gelade