Gelo may refer to:
- Gelo or Gelon (died 478 BC), ruler of Gela and Syracuse (5th century BC)
- Gelo, son of Hiero II (died 216 BC) of Syracuse
- The Gelao people, a nationality of China
- Gelo Racing, a racing team named for Georg Loos
- Gelonus, a Scythian city
- Gelo, Mozambique, a number of towns in Mozambique
- Gelo di melone, a jellied watermelon pudding
- Gelo (film), a 2016 Indian film
- LiAngelo Ball (born 1998), American basketball player nicknamed "Gelo"
- Gelo (dish), a French gelatin based pudding