Octodon is a genus of octodontid rodents native to South America. The best-known member is the common degu, O. degus. Two of the four species of degus are nocturnal. The full list of species is:
- O. bridgesi, Bridges' degu, found in Argentina and Chile
- O. degus, the common degu or degu, found in central Chile
- O. lunatus, the moon-toothed degu, a nocturnal animal found in central Chile
- O. pacificus, the Mocha Island degu or Pacific degu, a recently discovered species found exclusively on Mocha Island, Chile