ODU

ODU may stand for:
 * Civic Democratic Union, a former party in Slovakia
 * Odigo User File, a file extension used in Odigo Messenger
 * Ohio Dominican University in Columbus, Ohio, United States
 * Old Dominion University in Norfolk, Virginia, United States
 * Operational Dress Uniform, a work uniform of the United States Coast Guard
 * Optical channel Data Unit, the digital path layer for the Optical Transport Network (OTN)
 * Out-Door Unit, a unit used in microwave transmission