William Crittenden Mooney (born June 15, 1855) was a Republican politician who represented Ohio in the United States House of Representatives during the 64th Congress. Serving as a member of the U.S. House from Ohio’s 15th Congressional District, he held office as a Representative from December 6, 1915, to March 3, 1917. His tenure in Congress marked his service at the federal level during the mid-1910s.

Mooney’s congressional career was limited to a single term, and he is recorded as a former officeholder rather than a long-serving member of the House. As a Republican representative from Ohio, his service placed him within the broader context of early 20th-century American politics, though specific committee assignments, legislative initiatives, or subsequent public roles are not detailed in the available record.