WCOS may refer to:

• WCOS (AM), a radio station (1400 AM) licensed to Columbia, South Carolina, United States
• WCOS-FM, a radio station (97.5 FM) licensed to Columbia, South Carolina, United States
• WOLO-TV, a television station (channel 25 analog/8 digital) licensed to Columbia, South Carolina, United States, which formerly used the call sign WCOS-TV

• Keys to the VIP
• Keys to the vip
• Keys to the World
• Keystream
• Keystrengthening
• Key stretching
• Keystroke
• Keystroke combination
• Keystroke dynamics
• Keystroke Dynamics
• Keystroke level model
• Keystrokes
• Keystudio
• Key (surname)
• Keyswitch (keyboard)
• Keysym
• Key system
• KeY System
• Key system unit
• Key System Unit
• Keyta
• Key Telephone System
• Key, the Metal Idol
• Key the metal idol
• Key the Metal Idol