Erk or ERK may refer to:
Politics Estonian Nationalists and Conservatives, political party in Estonia Erk (historic party), a socialist party in Bashkiria, Bukhara and Turkestan from 1919 to 1921 Erk Democratic Party, a political party in Uzbekistan
People Edmund Frederick Erk (1872–1953), American politician Erk Russell (1926–2006), American college football coach Erk Sens-Gorius (born 1946), German fencer Kutlay Erk, Cypriot politician Ludwig Erk (1807–1883), German musicologist
Fictional Characters Erk, a mage from the tactical role-playing game Fire Emblem: The Blazing Blade
Other uses Erk, Hungary, a municipality in Hungary Enköpings RK, a Swedish rugby union club Extracellular signal-regulated kinases, a kind of protein molecule Nafsan language Erk, an aircraftman in Royal Air Force slang