William Sawalich (born October 3, 2006) is an American professional stock car racing driver.

18 Toyota GR Supra for Joe Gibbs Racing, part-time in the NASCAR Craftsman Truck Series, driving the No.

[1] He moved into legends cars in 2020, winning the INEX Young Lions State Championship in Minnesota.

[1][2] He won an INEX sanctioned Legends division feature race at Elko Speedway (MN) on August 22, 2020.

Despite missing two races, he finished fourth in the standings, with one win at Carteret County Speedway,[4] and seven top fives.

He made his CARS Tour debut at Tri-County Motor Speedway in September, in which he started on the pole.

[9] In 2023, Sawalich won the All American 400 in a controversial ending, after the top eight drivers were eliminated due to fluid on the racetrack, causing them to slip up and hit the wall.

In his first East Series start at Five Flags Speedway, Sawalich won the pole and led every lap to earn his first career ARCA win.

[13] He earned his second win of the season at ARCA's return to Flat Rock Speedway, leading the final 50 laps of the race.

[14] He scored his third win of the season at Berlin Raceway, after passing Jesse Love for the lead with two laps to go.

[18] In the East Series first race of the season, Sawalich would lead the most laps at Five Flags, but he would end up finishing second to Gio Ruggiero.

[25] He made his debut at Martinsville Speedway, finishing ninth after running near the top ten for most of the race.

[32] He has a sister, Amelia, who is in a relationship with fellow NASCAR Xfinity Series driver Sam Mayer.

* Season still in progress 1 Ineligible for series points (key) (Bold – Pole position awarded by qualifying time.