Ashmun is a surname that may refer to:
Eli P. Ashmun (1770–1819), Massachusetts State Representative 1803–04, Massachusetts State Senator 1808–10, Massachusetts Governor's Councilman 1816, U.S. Senator from Massachusetts 1816–18. Father of George Ashmun George Ashmun (1804–1870), Massachusetts State Representative 1833–37, Massachusetts State Senator 1838–40, U.S. Representative from Massachusetts 1845–51, delegate to the Republican National Convention 1860. Son of Eli P. Ashmun George Parish Ashmun, doctor and state senator in Ohio who served in the Union Army and served as mayor of Hudson, Ohio Jehudi Ashmun (April 21, 1794 – August 25, 1828), religious leader and social reformer in New England Margaret Ashmun (July 10, 1875 – March 15, 1940), writer from Wisconsin
See also Ashmun Institute, predecessor of Lincoln University (Pennsylvania) Ashmun Street in Monrovia, Liberia Ashmun Bay in Michigan