William Wallace "W. W." McCredie (April 27, 1862 - May 10, 1935) was a U.S. Representative from Washington.
Born in Montrose, Pennsylvania, McCredie moved to Iowa with his parents, who settled on a farm near Manchester in Delaware County. He attended the common schools, going on to graduate from Cornell College in 1885. He taught school at Parkersburg, Iowa from 1885 to 1889. He attended the law school of the University of Iowa in 1889 and 1890, then moved to Portland, Oregon in 1890 and completed the study of law. He was admitted to the bar the same year and commenced practice in Vancouver, Washington. During his early legal career, he served as prosecuting attorney of Clarke County, Washington from 1894 to 1896 and served as judge of the superior court at Vancouver, Washington from 1904 to 1909. He became part owner of the Portland baseball club in 1904.
McCredie was elected as a Republican to the Sixty-first Congress to fill the vacancy caused by the death of Francis W. Cushman and served from November 2, 1909, to March 3, 1911. He was an unsuccessful candidate for renomination in 1910 to the Sixty-second Congress. He resumed his interest in the Portland club of the Pacific Coast Baseball League, serving as president until 1921, when he retired. He continued the practice of law in Portland until his death in that city on May 10, 1935. He was interred in Lincoln Memorial Cemetery.