| Araranguá River | |
| Source1 Location: | Santa Catarina state |
| Mouth: | Atlantic Ocean |
| Subdivision Type1: | Country |
The Araranguá River is a river of Santa Catarina state in southeastern Brazil.
One of the earliest documented attestation of the river, still bearing the name of Ararunga, was cited by João Teixeira Albernaz. The origin of this name remains unknown to this date.