William Gay or variants may refer to:
Sportspeople William Gay (cornerback) (born 1985), American NFL player drafted by the Pittsburgh Steelers in 2007 William Gay (defensive lineman) (born 1955), retired American NFL player Willie Gay (born 1998), American football linebacker Willie Gay (baseball) (1909–1970), American baseball player Bill Gay (1927–2008), American football defensive back
Other people William Gay (author) (1941–2012), American writer of novels and short stories William Gay (landscape gardener and surveyor) (1814–1893), British landscape gardener and surveyor William Gay (poet) (1865–1897), Scottish-born Australian poet Frank William Gay (1920–2007), also known as Bill Gay, American businessman
See also William G. Brown Sr. (William Gay Brown Sr., 1800–1884), American politician from Virginia and West Virginia William G. Brown Jr. (William Gay Brown Jr., 1856–1916), American politician from West Virginia