Cosman is a surname. Notable people with the surname include:
Douglas I. Cosman (born 1938), Canadian politician and businessman Felicia Cosman, American osteoporosis specialist Francene Cosman (born 1941), Canadian politician Jim Cosman (1943–2013), American baseball player Lilia Cosman (born 2007), Romanian-American artistic gymnast Madeleine Cosman (1937–2006), American academic, writer and activist Milein Cosman (1921–2017), German-born British artist Pamela Cosman, American computer and electrical engineer
See also Cosman Citroen (1881–1935), Dutch architect Cosman Family Cemetery, New York