Mercer is the given name of:
Mercer Barrows, American television producer, art director and writerMercer Ellington (1919-1996), American jazz trumpeter, composer and arrangerMercer Mayer (born 1943), American children's book writer and illustratorMercer Reynolds (born 1945), American businessmanMercer Simpson (1926-2007), English writer active in Welsh literary circles