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- Marc Cooper, American journalist and blogger
- Marianne Leone Cooper (born 1952), American actress
- Marina Cooper, fictional character from Guiding Light
- Marissa Cooper, fictional TV character from The O.C.
- Mark Cooper (disambiguation)
- Marquis Cooper (1982–2009), American NFL football player
- Martha Cooper (born c. 1940), American photojournalist
- Martin Cooper (disambiguation)
- Marvin Cooper (born c. 1943), better known as Dancing Harry, dancer at professional basketball games
- Matt Cooper (disambiguation)
- Matthew Cooper (disambiguation)
- Merian C. Cooper (1893–1973), American movie actor, director, screenwriter and producer
- Michael Cooper (disambiguation)
- Mike Cooper (disambiguation)
- Milton William Cooper (1943–2001), American writer
- Miranda Cooper (born 1975), British songwriter
- Mort Cooper (1913–1958), American baseball player
- Myers Y. Cooper (1873–1958), American politician
Read more about this topic: Cooper (surname)