Western Washington Inter-Collegiate Athletic Association
The Western Washington Inter-Collegiate Athletic Association was an early athletic conference governing competition between member institutions in Western Washington on the Puget Sound.
Member institutions
| Member institution | Date joined | Notes |
| Puget Sound University | April 1891 | |
| Whitworth College | April 1891 | |
| Washington College | April 1891 | |
| University of Washington | April 1891 | |
| Tacoma Academy | April 1891 | |
| Seattle University | March 1893 | |
| Vashon College | March 1893 | |
| Olympia Collegiate Institute | March 1893 |