Leonard Joseph Zengel (March 15, 1887 – September 24, 1963) was an American racing driver.

On October 8, 1910, Zengel won the annual Fairmount Park road race in Philadelphia driving a Chadwick Engineering Works auto.

[1] He married Mary L. Howell and had a son, Leonard Joseph Zengel Jr. (1915-1944) who died in a car accident when he fell asleep at the wheel in Pittsburgh, Pennsylvania.

[5] He operated a Chrysler and Plymouth dealership.

Zengel died on September 24, 1963, in Bryn Mawr, Pennsylvania, at age 76.