Plinio may refer to:
- Pliny, in Italian
- Pliny the Elder (c. 23 – 79)
- Pliny the Younger (61 – c. 113)
- Ulmus 'Plinio', an elm cultivar named after Pliny
- Plínio (footballer, born 1946), José Plínio de Godoy, Brazilian football midfielder
- Plínio (footballer, born 1984), Plínio Marcos da Silva, Brazilian football defender