Isaac Johnson (born May 12, 2000) is an American professional stock car racing driver who competes part-time in the ARCA Menards Series, driving the No. 34 Ford Mustang for Greg Van Alst Motorsports.

Johnson first began racing as a child, competing in online simulation racing before progressing up to go-karts.^[1]

In 2021, Johnson made select starts in the Kenyon Midget Series, getting a best finish of tenth at Anderson Speedway. He would make three more starts in the series the following year, getting two top-ten finishes at Anderson and Gas City I-69 Speedway with a best finish of fifth at Anderson after starting last.^[2] It was also during this year that he would compete in the Southern All Star Dirt Racing Series and the Ultimate Heart of America Super Late Model Series.^[3]

In 2023, Johnson would race in the Carolina Pro Late Model Series, getting a best finish of fifth at Franklin County Speedway. In August of that year, it was announced that he would make his ARCA Menards Series debut at Lucas Oil Indianapolis Raceway Park, driving the No. 93 Chevrolet for Costner Weaver Motorsports. It will also be his debut in the ARCA Menards Series East, as it is a companion event with the main ARCA series.^[1] Johnson finished the race in twelfth.

In 2024, Johnson participated in pre-season testing for the ARCA Menards Series at Daytona International Speedway driving for Greg Van Alst Motorsports in the No. 34 Ford.^[4][5] Several days after the test, it was reveled that Johnson would drive the No. 34 for Van Alst in the season opening race.^{[6][7][8][9][10]} He started in ninth but went on to finish eighteenth after being collected in a multi-car crash on the final lap of the race.^[11][12][13] Johnson then entered in the following race at Phoenix Raceway, still driving the No. 34 for Van Alst.^[14] After placing 21st in the lone practice session,^[15] he qualified for the race in 27th and finished in 24th.^[16][17][18]

Johnson works as a sales engineer for George E. Booth Company, which also serves as his sponsor when he races.^[19]