Champions

The formation of the North American F18 Class Association (NAF18) was the origin of organized F18 class racing in both the United States and Canada. In 2009 the Canadian Formula 18 Class Association (CanF18) was founded in a move to guarantee berths at F18 Worlds events. While initially resistant, by 2010 NAF18 was officially renamed to the United States Formula 18 Class Association (USF18). Events through 2011 were all North Americans as their organization originated within NAF18.

As the F18 class grew internationally with the formation of the Argentinian and Chilean F18 Class Associations, the Americas championship was formed. In both 2012, 2018 and 2022 USF18 has had the opportunity to host F18 Worlds bringing in competitors from across the globe. In 2019 USF18 and CanF18 came together again for the first North Americans since the NAF18 era. 2023 was the second time a North American Championship was held in Canada.

When an international caliber event is hosted by USF18, no lesser major event is held. For World Championships, the teams listed below are the top placing US team, and the proceeding number is their finishing place if they did not place first.