Horsman is a surname. Notable people with the surname include:
Thomas Horsman (c.1536–1610), English politician and member of parliament
Edward Horsman (1807–1876), British politician, Chief Secretary to Ireland
Edward Horsman (1873–1918), American composer – scores by Edward Horsman at the International Music Score Library Project
Jim Horsman (James "Jim" Deverell Horsman, CM AOE, born 1935), Canadian politician