McCay is a surname. Notable people with the surname include:
Albert McCay (1901–1969), American politician from New Jersey Bill McCay (born 1951), American author of over seventy books Bob McCay (1896–1962), American cartoonist Clive McCay (1898–1967), biochemist, nutritionist, gerontologist, and professor of Animal Husbandry at Cornell University Daniel McCay (fl. 2010s–present), American politician from Utah Henry Kent McCay (1820–1886), United States federal judge James Whiteside McCay KCMG, KBE, CB, VD (1864–1930), Australian general and politician Liam McCay (born 2005), Irish slowcore artist Norman McCay, fictional character from the DC Comics series Kingdom Come Patrick McCay (born 1952), Irish born Scottish-American painter who resides in the Boston area Peggy McCay (1927–2018), American actress, with a career spanning over fifty years in films, television and soap operas Ryan McCay (born 1986), Scottish footballer Winsor McCay (1869–1934), American cartoonist and animator
See also Winsor McCay Award, given to individuals in recognition of lifetime or career contributions in animation