McGlothlin is a surname. It is an Anglicised form of the Gaelic MacLochlainn, meaning "son of Lochlann".
Notable people with the surname include:
Jean McGlothlin Doerge (b. 1937), American politician Jim McGlothlin (1943–1975), American baseball player Jim and Woodrow McGlothlin, father and son who founded United Coal Company Michael McGlothlin (born 1951), American politician
See also 10638 McGlothlin, main-belt asteroid Pat McGlothin (1920–2014), American baseball player