Eridanus can refer to:

Rivers

• Eridanos (mythology) (or Eridanus), a river in Greek mythology, somewhere in Central Europe, which was territory that Ancient Greeks knew only vaguely
• The Po River, according to Roman word usage
• Eridanos (Athens), a former river near Athens, now subterranean
• Eridanos (geology), a former large river that flowed between forty million and seven hundred thousand years ago from Lapland to the North Sea through where the Baltic Sea is now

Astronomy

• Eridanus (constellation), a southern constellation
• Eridanus Cluster of galaxies in the constellation Eridanus
• Eridanus II, a low-surface brightness dwarf galaxy in the constellation Eridanus
• Eridanus Supervoid, a large-scale cosmic underdensity

Miscellaneous

• Éridan (rocket), a French rocket
• Éridan-class minehunter, a class of French naval minehunters
• Eridanosaurus, a rhinocerotid originally described as a crocodilian
• USS Eridanus (AK-92), a ship of the United States Navy
• Eridan Ampora, a character from the webcomic Homestuck (2009-2016)

This disambiguation page lists articles associated with the title Eridanus.
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