Hoar is a surname. Notable people with the surname include:
Ebenezer R. Hoar (1816–1895), influential American politician and lawyer
George Frisbie Hoar (1826–1904), prominent United States politician
Harold Frank Hoar (1909–1976), British architect and cartoonist (as 'Acanthus')
Joseph P. Hoar (born 1934), retired U.S. Marine Corps general
Leonard Hoar (1630–1675), early American clergyman and educator
Rockwood Hoar (1855–1906), member of the United States House of Representatives
Roger Sherman Hoar (1887–1963), former state senator and assistant Attorney General of Massachusetts
Samuel Hoar (1778–1856), United States lawyer and politician
Sherman Hoar (1860–1898), American lawyer
Syd Hoar (1895–1967), English footballer
Thomas Bertie (1758–1825), Royal Navy officer born Thomas Hoar
