Professional leagues Since 1996,
Major League Soccer (MLS) has been the only sanctioned USSF Division I men's outdoor soccer league in the United States. MLS has grown from 10 teams in 1996 to 30 teams in 2025. The
USL Championship (USLC) is the only sanctioned Division II men's outdoor soccer league as of 2025. Formed in 2010 as a result of the merger of the former
USL First Division and
USL Second Division, the USL Championship was sanctioned as Division III league from 2011 to 2016 before becoming provisionally sanctioned as a Division II league for 2017, and receiving full Division II sanctioning in 2018. The USL Championship expanded almost three-fold since its first season in 2011 to include 35 teams in the 2020 season, with the league divided into two conferences, Eastern and Western. After that season, held amid the backdrop of the
COVID-19 pandemic, five teams left the league. The previous Division II
North American Soccer League (NASL) was formed in 2009, but did not debut until 2011 following the controversial 2010 season that saw neither the
USL First Division nor the NASL receive Division II sanctioning from the USSF, resulting in the temporary
USSF Division 2 Pro League. The NASL was sanctioned as a Division II league from 2011 to 2016; when it fielded 8 teams for the 2017 season, U.S. Soccer only granted the league provisional sanctioning as it fell under the 12-team requirement. The USSF rejected the NASL's application to maintain provisional Division II status for the 2018 season as the NASL did not present a plan on how it would meet the Division II criteria. In response, the NASL filed "a federal antitrust suit against the U.S. Soccer Federation" in an
attempt to force USSF to drop all Division designations. Due to the litigation against U.S. Soccer, the NASL wound up canceling the 2018 season and ceased operations entirely. In February 2025, a federal jury dismissed the suit. In March 2017, the
United Soccer League announced following the sanctioning of the USL Championship as a Division II league it would start a new tier in its professional structure.
USL League One received sanctioning in December 2018 and conducted its first season in 2019 with 10 teams. Ahead of its 2025 season, the league is slated to have 18 teams. A second Division III league, the
National Independent Soccer Association (NISA) also debuted in 2019 with eight teams. The league initially played a fall-to-spring season spanning two calendar years but switched to the standard U.S. schedule in 2022. NISA was not given professional sanctioning for the 2025 season. In 2018, the
National Premier Soccer League (NPSL), a nationwide amateur league announced the intention to set up a professional division, NPSL Pro. As part of the announcement, NPSL initiated a single season competition, the
NPSL Founders Cup, involving 11 teams that were to form the new league. As of 2025 this has not materialized and NPSL remains an amateur competition. Soon after the NASL's antitrust case against USSF concluded, the USL announced plans to launch a new Division I league by 2028. Outside reporting revealed that the new league may have between 12–14 teams and focus on mid-size cities not currently serviced by Major League Soccer.
Number of teams in each league Below is a list of the number of teams sanctioned by the USSF under the current division sanctioning scheme described above.
Notes Semi-professional and amateur leagues The USSF does not officially recognize distinctions beyond the three professional divisions above. Currently, three other national leagues are sanctioned by the US Soccer Federation and one of those, the
National Premier Soccer League (NPSL), is part of
USASA which is a national association member of the USSF and the only member of the Adult Council.
USL League Two (USL 2) is a national league run by the USL. Both are recognized in practical terms as playing at a higher level and both since 2020 are considered national leagues earning automatic berths to the
US Open Cup first round based on their previous season's league results rather than going through local qualifying. The
United Premier Soccer League (UPSL) is also recognized by the USSF as a National Affiliate, but does not gain automatic entry to the Open Cup through the National League track, instead going through local qualifiers. Additionally, clubs in USL2, UPSL and NPSL pay some of their players and are more accurately described as semi-professional leagues.
USL League Two takes place during the summer months, and has age restrictions. Thus, the player pool is drawn mainly from
NCAA college soccer players seeking to continue playing high level soccer during their summer break, while still maintaining their college eligibility. The
National Premier Soccer League is similar to USL2 and also attracts top amateur talent from around the United States. However, unlike USL2, the NPSL does not have any age limits or restrictions, thus incorporating both college players and former professional players.. The
United Premier Soccer League takes place year round with two seasons, one in spring and one in fall. Unlike USL2 and NPSL, the UPSL does not rely on college players and is the national league with the most diverse participation.
Men's league structure The table below shows the current structure of the system. For each division, its official name, sponsorship name, number of clubs and conferences/divisions are given. The
United States Soccer Federation regulates the standards for a league or division to be recognized as professional, while also determining the level of division for each league. The system is only defined as far as Division 3. Some semi-professional leagues refer to themselves as fourth division, however any tier or division numbers are not recognized for these leagues as U.S. Soccer does not designate a division number nor directly sanction anything below Division 3. What follows is a list of additional notable leagues.
Men's national soccer cups •
U.S. Open Cup – open to all US Soccer sanctioned amateur and professional leagues, though professional teams that are owned by, or whose playing staffs are managed by, higher-level outdoor professional teams are generally barred from entry. However, starting in 2025, MLS clubs may participate in no more than two cup competitions among the CONCACAF Champions Cup,
Leagues Cup and U.S. Open Cup per year. If an MLS club is playing in both the CONCACAF Champions Cup and the Leagues Cup and is thereby unable to participate in the U.S. Open Cup, a lower-tier club owned or controlled by such MLS club is eligible to participate in the U.S. Open Cup, if it qualifies. This rule will remain in effect through at least 2026. •
USASA National Amateur Cup – USASA cup tournament open to amateur-only teams from USASA sanctioned leagues. Winner gains entry to the U.S. Open Cup. •
Hank Steinbrecher Cup – contested between the defending champion, the league winners of the NPSL and USL League Two, and the defending champion of the USASA Amateur Cup. ==Women's leagues==