Ertz is a surname. Notable people with this surname include:
Bruno Ertz (1873–1956), American painter Edward Frederick Ertz (1862-1954), Anglo-American artist Julie Ertz (born 1992), American soccer player; wife of Zach Ertz Klaus Ertz (born 1945), German art historian Susan Ertz (1887–1985), Anglo-American writer Zach Ertz (born 1990), American football player; husband of Julie Ertz