Unruh (or Unrug) is a surname. Notable people with the surname include:
Antoni Unrug (1860-1939), Polish generalFritz von Unruh (1885–1970), German dramatistHans Victor von Unruh (1806–1886), Prussian politicianHoward Unruh (1921–2009), American spree killerJack Unruh (1935–2016), American illustratorJesse M. Unruh (1922–1987), American politicianJessica Unruh, American politicianJózef Unrug (Joseph von Unruh in German; 1884–1973), Polish naval officerLeslee Unruh, American activistN. U. Unruh (born 1957), German musicianOtto D. Unruh (1899–1992), American football player and coachPaul Unruh (born 1928), American basketball playerPaweł Unrug (born 1939), Polish actor and directorSigismund von Unruh (1676–1732), Polish-Lithuanian Commonwealth noble and court officialWilliam George "Bill" Unruh (born 1945), Canadian physicistWiktor Unrug (1886-1973), Polish lieutenant colonel