Blatz as a surname may refer to: Jerome Blatz (1923–2009), Minnesota attorney and politician Kathleen A. Blatz (born 1954), Minnesota judge and politician Kelly Blatz (born 1987), American actor and singer Valentin Blatz (1826–1894), German-American brewer and banker, founder of the Valentin Blatz Brewing Company William E. Blatz (1895–1964), German-Canadian developmental psychologist