DCU

DCU may refer to:


 * D.C. United, an American professional soccer team based in Washington, D.C., United States
 * DC Universe, the fictional universe that serves as a setting for DC Comics stories
 * DC Universe (franchise), a media franchise
 * Dublin City University
 * DCU GAA, a Gaelic games club in Dublin City University
 * Digital Federal Credit Union, a credit union based in Marlborough, Massachusetts, United States
 * DCU Center, an indoor arena in Worcester, Massachusetts, United States
 * Delphi Compiled Unit, an object file for the Delphi programming language
 * Desert Camouflage Uniform, a U.S. military uniform that was used in arid areas during the 1990s and 2000s
 * Detached Carrier Unit of the United States Postal Service
 * Pryor Field Regional Airport, an airport Decatur, Alabama, United States, with the IATA code DCU
 * Dicyclohexylurea, an organic compound
 * Door control unit, an automative electronic system