American soccer writing, history & data.
| League | Years |
|---|---|
| National Association Football League | 1895-1900 |
| National Association Football League | 1906-1921 |
| National Independent Soccer Association | 2019-2024 |
| National Indoor Soccer League | 2008-2009 |
| Lineage: Major Indoor Soccer League | |
| National Premier Soccer League Lineage | 2003-present |
| Lineage: National Premier Soccer League | Related leagues: Men's Premier Soccer League, National Premier Soccer League | |
| National Premier Soccer League | 2005-present |
| Lineage: National Premier Soccer League | |
| National Professional Soccer League | 1967-1967 |
| Lineage: North American Soccer League | Related leagues: North American Soccer League, North American Soccer League Indoor League | |
| National Professional Soccer League | 1984-2001 |
| Related leagues: American Indoor Soccer Association | |
| National Soccer League | 1924-present |
| National Soccer League | 1926-1941 |
| Lineage: Canadian National Soccer League | Related leagues: National Soccer League, National Soccer League, National Soccer League, Second Division | |
| National Soccer League | 1946-1978 |
| Lineage: Canadian National Soccer League | Related leagues: National Soccer League, National Soccer League, National Soccer League, Second Division | |
| National Soccer League | 1952-1953 |
| Lineage: Baltimore Unlimited Soccer League | Related leagues: National Unlimited Soccer League | |
| National Soccer League | 1979-1992 |
| Lineage: Canadian National Soccer League | Related leagues: National Soccer League, National Soccer League, National Soccer League, Second Division | |
| National Soccer League, Second Division | 1975-1978 |
| Lineage: Canadian National Soccer League | Related leagues: National Soccer League, National Soccer League, National Soccer League | |
| National Unlimited Soccer League | 1953-1954 |
| Lineage: Baltimore Unlimited Soccer League | Related leagues: National Soccer League | |
| National Women's Soccer League | 2013-present |
| New England Soccer League | 1914-1924 |
| Related leagues: Southern New England League | |
| North American Soccer Football League | 1946-1947 |
| North American Soccer League Lineage | 1967-1985 |
| Lineage: North American Soccer League | Related leagues: National Professional Soccer League, North American Soccer League, North American Soccer League Indoor League, United Soccer Association | |
| North American Soccer League | 1968-1985 |
| Lineage: North American Soccer League | Related leagues: National Professional Soccer League, North American Soccer League Indoor League | |
| North American Soccer League | 2011-2017 |
| North American Soccer League Indoor League | 1979-1984 |
| Lineage: North American Soccer League | Related leagues: National Professional Soccer League, North American Soccer League | |