WTKM may refer to:

• WTKM-FM, a radio station (104.9 FM) licensed to serve Hartford, Wisconsin, United States
• WPTT (AM), a radio station (1540 AM) licensed to serve Hartford, Wisconsin, which held the call sign WTKM from 1951 to 2017

• John Nickolaus
• John Nickolaus Jr.
• John Nickolaus, Jr.
• John Nickolls
• John Nicolas Coldstream
• John Nicolayson
• John Nicol Crombie
• John Nicol Farquhar
• John Nicoll (chronicler)
• John Nicoll (disambiguation)
• John Nicolson (journalist)
• Johnnie and Steve
• Johnnie Arthur
• Johnnie Baker
• Johnnie Boden
• Johnnie Carson (diplomat)
• Johnnie Chambers
• Johnnie Colemon
• Johnnie Cowan
• John Niederhuber
• Johnnie Dixon
• Johnnie Ecker
• Johnnie Grant
• Johnnie H. Corns
• Johnnie Johnston