Football leagues similar to or like USL Championship

Professional men's soccer league in the United States and Canada that began its inaugural season in 2019. United Soccer League announced the formation of the league on April 2, 2017, with the temporary name USL Division III (USL D3). Wikipedia

Run by different organizations. The United States Soccer Federation governs most levels of soccer in the country, including the national teams, professional leagues, and amateur leagues. Wikipedia

Organizer of several soccer leagues with teams in the United States and Canada. It includes men's and women's leagues, both professional and amateur. Wikipedia

Series of professional and amateur soccer leagues based, in whole or in part, in the United States. Sometimes called the American soccer pyramid, teams and leagues are not linked by the system of promotion and relegation typical in soccer elsewhere. Wikipedia

Men's professional soccer league sanctioned by the United States Soccer Federation, which represents the sport's highest level in the United States and Canada. The league comprises 27 teams – 24 in the U.S. and 3 in Canada – and will expand to 30 teams by the 2023 season. Wikipedia

Despite each receiving FIFA-affiliated status in 1913, both the United States and Canada have lacked a consistent, multi-division soccer system until recently. Consequently, the determination of champions has been problematic at times. Wikipedia