| Classification | Class-D |
|---|---|
| Sport | Minor league baseball |
| First season | 1903 |
| Ceased | 1906 |
| No. of teams | 5 |
| Country | United States |
The Southwest Washington League was a Class-D level Minor League Baseball circuit based in the southwest region of Washington state that played three seasons from 1903 to 1906. The league teams played six times a week, but only the weekend games counted in the standings.