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.
Teams in the league included the Aberdeen Pippins, Centralia Midgets, Hoquiam Loggers, Montesano Farmers and Olympia Senators.
[1] The inaugural league championship was won by the Aberdeen Pippins, who finished the season with a .611 winning percentage.
Hoquiam refused to play off the tie; the championship was awarded to Aberdeen.