Football in the United States has never been more visible. In 2026 the country co-hosted the FIFA World Cup, Lionel Messi is a reigning MLS champion, and women’s club matches are filling NFL stadiums. Yet for fans outside North America, the American league system can be confusing, with several competitions, no promotion or relegation and strong interest in foreign leagues.
This guide explains how the system works, then looks at the most popular football leagues in the USA, from Major League Soccer and the NWSL to the lower divisions and the overseas leagues that Americans watch most on television.
How the US League System Works
First, a note on language. In the USA, “football” usually means American football, so the global game is mostly called soccer. The governing body, U.S. Soccer, sanctions leagues by division. Division I is the top level, followed by Division II and Division III. Unlike most of the world, clubs do not move between divisions through promotion and relegation, and teams join top leagues through expansion.
Major League Soccer (MLS)
MLS is the biggest and most popular football league in the USA. It played its first season in 1996, two years after the country hosted the 1994 World Cup, and now has 30 clubs across the United States and Canada. Teams are split into Eastern and Western Conferences, and the season ends with playoffs and the MLS Cup final.
The league’s profile changed when Messi joined Inter Miami in July 2023. In 2025 he won the Golden Boot with 29 goals, then provided two assists as Miami beat the Vancouver Whitecaps 3-1 on 6 December to win their first MLS Cup. Other stars such as Son Heung-min at LAFC and Thomas Muller at Vancouver have added to the league’s global appeal.
The numbers show growing demand. The 2026 opening weekend drew 387,271 fans, the best match weekend in MLS history, including 75,673 at the Los Angeles Memorial Coliseum for LAFC against Inter Miami. Through May, the league averaged 22,109 fans per match, second only to its 2024 record, while weekly live viewership rose 62% year on year to 7.9 million.
National Women’s Soccer League (NWSL)
The NWSL is the top professional women’s league and one of the strongest women’s club competitions in the world. Launched in 2013, it expanded to 16 teams in 2026 with the arrival of Boston Legacy and Denver Summit. Every team plays a 30-match regular season, and the top eight reach the playoffs.
Denver made an instant impact. On 28 March 2026, 63,004 fans watched the Summit draw 0-0 with the Washington Spirit at Empower Field at Mile High, smashing the previous league record of 40,091 set by Bay FC in 2025. On television, the 2025 final, won 1-0 by Gotham FC against Washington, averaged 1.18 million viewers on CBS, the first NWSL match to pass one million.
The USL Pyramid
USL Championship and League One
The United Soccer League runs the main competitions below MLS. The USL Championship is Division II and featured 25 clubs in 2026, including newcomers Brooklyn FC and Sporting JAX. Crowds average around 5,000, with clubs such as Louisville City and New Mexico United among the best supported. USL League One, at Division III, adds 17 more professional clubs.
USL Super League
The USL also operates the USL Super League, a women’s competition that U.S. Soccer granted Division I status in February 2024, alongside the NWSL. It began in 2024-25, had nine teams in 2025-26, and Lexington SC won that season’s championship.
The Foreign Leagues Americans Love
Popularity in the USA is not only about domestic football. England’s Premier League, shown on NBC since 2013, has averaged more than 500,000 English-language viewers per match for five straight seasons. Manchester City’s 2-1 win over Arsenal on 19 April 2026 averaged 2.6 million viewers across NBC, Peacock and Telemundo, the most-watched Premier League game in US history.
Mexico’s Liga MX has a huge following too, especially among Mexican-American fans watching Spanish-language broadcasts. For many years it was the most-watched league on US television, with Club America against Chivas its biggest attraction. However, Nielsen data analysed in 2023 showed the Premier League had moved ahead of it.
Quick Comparison
| League | Level | Teams | Standout figure |
| MLS (men) | Division I | 30 | Record 387,271 fans on 2026 opening weekend |
| NWSL (women) | Division I | 16 | League record crowd of 63,004 in Denver |
| USL Super League (women) | Division I | 9 (2025-26) | Lexington SC won the 2025-26 title |
| USL Championship (men) | Division II | 25 | Season high crowd of 14,847 in New Mexico |
| Premier League (England) | Foreign | 20 | 2.6 million US viewers for one match |
What Comes Next
MLS remains the clear leader in attendance and investment, while the NWSL is breaking records in both stadiums and TV audiences. The USL offers local, community-based football across dozens of cities. With the 2026 World Cup bringing new fans to the game, the question for American football is no longer whether people will watch, but which league can keep their attention.
