Hosmer is a surname. Notable people with the surname include:
Andrew Hosmer (born 1964), New Hampshire state senator Bradley C. Hosmer (born 1937), twelfth Superintendent of the United States Air Force Academy Craig Hosmer (1915–1982), United States Representative from California Dorothy Hosmer (1911–2008), American photographer and travel writer Eric Hosmer (born 1989), American professional baseball player Frederick Lucian Hosmer (1840–1929), American Unitarian hymnist George Hosmer (1781–1861), U.S. lawyer and politician George Washington Hosmer (1804–1881), American educator Harriet Goodhue Hosmer (1830–1908), American sculptor Henry J. Hosmer (1832–1902), American politician and businessman Hezekiah L. Hosmer (1765–1814), U.S. Representative from New York Hezekiah Lord Hosmer (judge) (1814–1893), American lawyer, judge, journalist, and author James Kendall Hosmer (1834–1927), American educator, historian and writer Jean Hosmer (1842–1890), American actress Ralph Hosmer (1874–1963), Hawaii's First Forester Sasha Hosmer (born 1998), frontperson of New York City slowcore band Heaviness Fell Stephen Hosmer (1763–1834), Connecticut jurist Titus Hosmer (1736–1780), Continental Congressman from Connecticut and father of Stephen Hosmer Thomas Hosmer Shepherd (1793–1864), English watercolor artist Trina Hosmer (born 1945), American cross-country skier William Hosmer (1810–1889), American anti-slavery author and editor William Howe Cuyler Hosmer (1814–1877), American poet