WMDR may refer to:

• WMDR (AM), a radio station (1340 AM) licensed to Augusta, Maine, United States
• WMDR-FM, a radio station (88.9 FM) licensed to Oakland, Maine, United States
• WXLP, a radio station (96.9 FM) licensed to Moline, Illinois, United States, which held the WMDR call sign from 1970 to 1975

• Federated web services
• Federated Workers Trade Union
• Federati
• Federatia Ecologista din Romania
• Federation, Action for the Republic
• Federation Against Copyright Theft
• Federation Against Software Theft
• Federation and empire
• Federation architecture
• Federation (artist)
• Federation (Blake's 7)
• Federation Camerounaise de Cyclisme
• Federation CJA
• FEDERATION CJA
• Federation Commander
• Federation council of russia
• Federation Cup (Nigeria football)
• Federation Equestre International
• Federation Equestre Internationale
• Federation equestre internationale
• Federation Fellowship
• Federation for a democratic china
• Federation for american immigration reform
• Federation for Kentucky Equality, Inc.
• Federation for kentucky equality, inc.