Frank Kurtis, born Frank Peter Kuretich (January 25, 1908 – February 17, 1987), was an American racing car designer. He designed and built midget cars, quarter-midgets, sports cars, sprint cars, Indy cars, and Formula One cars. He was the founder of Kurtis Kraft.
Kurtis started Kurtis Kraft when he built his own midget car chassis in the late 1930s. In 1941, Kurtis designed a car named The Californian for Joel Thorne. Glenn Gordon "Gary" Davis (d. 1973) saw this car, and used the design for his Davis D-2 Divan, a 3-wheeled design of which only 13 were produced.
He built some very low glass-fibre bodied two-seaters sports cars under his own name in Glendale, California between 1949 and 1955. Ford (US) running gear was used. About 17 cars had been made when the licence was sold to Madman Muntz who built the Muntz Jet. In 1954 and 1955, road versions of his Indianapolis racers were offered.
Kurtis Kraft created over 550 ready-to-run midget cars, and 600 kits. The Kurtis Kraft chassis midget car featured a smaller version of the Offenhauser motor. The National Midget Auto Racing Hall of Fame describes the combination as "virtually unbeatable for over twenty years."  Kurtis Kraft created 120 Indianapolis 500 cars, including five winners.
His father Frank (Franjo) Andrew Kuretić was born in Razdrto, Croatia. Franjo worked as a blacksmith in the nearby Brod Moravice. He followed his brother Mijo (Mihovil) to the United States in 1902, where he married Appolonia Mary (Marija Apolonija), originally from Siverić in Croatia on April 22, 1907 in Utah.
He was related to Bill Kurtis. Bill Kurtis' father (Brigadier General William Albert Kurtis) was first cousin to Frank Kurtis. William's and Frank's fathers were brothers: Mijo and Franjo.
- He was inducted in the National Sprint Car Hall of Fame in 1994.
- He was inducted in the Motorsports Hall of Fame of America in 1999.
- He was the first non-driver to be inducted in the National Midget Auto Racing Hall of Fame at his 1986 induction.
- Phil Patton, "A Dreamer's Machine, More Promise Than Reality", New York Times (September 24, 2009)
- Biography at the National Midget Auto Racing Hall of Fame
- NEPOZNATI ŽIVOT GENIJALCA IZ RAZDRTOG Kako je siromašni Hrvat iz Gorskog kotara u Americi ušao u Kuću slavnih i postao legenda at Jutarnji List