KCMC may refer to:

• KCMC (AM), a radio station (740 AM) licensed to serve Texarkana, Texas, United States
• KCMC-FM, a radio station (94.3 FM) licensed to serve Viola, Arkansas, United States
• KTFS (AM), a radio station (940 AM) licensed to serve Texarkana, Texas, which held the call sign KCMC from 2014 to 2017

• John MacDonell (disambiguation)
• John Macdonell (jurist)
• John MacDonell (Scotus)
• John Macdonnell
• John Macdougall
• John MacDougall (UK politician)
• John Macdowall, 9th of Garthland
• John Mace (English cricketer)
• John MacFarlane
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• John MacGovern
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• John Macgregor (historian)
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• John MacGregor (politician)
• John Machnik
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• John Macintosh
• John MacIntosh
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• John MacIntosh Lyle
• John Mackay Shaw