General Mercer may refer to:
Cavalié Mercer (1783–1868), British Army general Charles F. Mercer (1778–1858), Virginia State Militia brigadier general David Mercer (Royal Marines officer) (1864–1920), Royal Marines major general Hugh Mercer (1726–1777), Continental Army brigadier general Hugh W. Mercer (1808–1877), Confederate States Army brigadier general Malcolm Mercer (1859–1916), Canadian Army major general Roosevelt Mercer Jr. (fl. 1970s–2000s), U.S. Air Force major general
See also Auguste Mercier (1833–1921), French Army general Denis Mercier (born 1959), French Air Force general