Hoar is a surname. Notable people with the surname include:
Ebenezer R. Hoar (1816–1895), influential American politician and lawyerGeorge Frisbie Hoar (1826–1904), prominent United States politicianHarold Frank Hoar (1909–1976), British architect and cartoonist (as 'Acanthus')Joseph P. Hoar (born 1934), retired U.S. Marine Corps generalLeonard Hoar (1630–1675), early American clergyman and educatorRockwood Hoar (1855–1906), member of the United States House of RepresentativesRoger Sherman Hoar (1887–1963), former state senator and assistant Attorney General of MassachusettsSamuel Hoar (1778–1856), United States lawyer and politicianSherman Hoar (1860–1898), American lawyerSyd Hoar (1895–1967), English footballerThomas Bertie (1758–1825), Royal Navy officer born Thomas Hoar