Roettger or Röttger is a surname. Notable people with the surname include:
Norman Charles Roettger, Jr. (1930–2003), American lawyer and judge Oscar Roettger (1900–1986), American first baseman and right-handed pitcher Timo Röttger (born 1985), German footballer Wally Roettger (1902–1951), professional baseball player Wilhelm Röttger (1894–1946), German executioner William Röttger (1948–2015), German label manager, music manager and gallery owner Wolfgang Röttger, German politician (German Christian Democratic Union)