Dashiell is both a given name and a surname. Notable people with the name include:
Given name:
Dashiell Eaves (born 1974), American actorDashiell Hammett (1894–1961), American authorGeorge Dashiell Bayard (1835–1862), American generalIsaac Dashiell Jones (1806–1893), American politicianDashiell Robert Parr, fictional character from The IncrediblesSurname:
Aaron Dashiell (21st century), American football safetyDoug Dashiell (1905–1975), American football coachPaul Dashiell (20th century), American football coachRobert B. Dashiell (1860–1899), American engineerWally Dashiell (1902–1972), American baseball shortstop