Nassau County League was an Independent League that was based in New York.
1903 - Cedarhurst, Freeport, Hempstead, Rockville Centre
1904 - Freeport, Greenwich Point, Garden City, Hempstead, Lynbrook, Seaford
1910 - Mineola, Hempstead, Lynbrook, Rockville Center
1911 - Freeport, Hempstead, Lynbrook, Oceanside, Rockville Centre, Woodmere