William Cotter Maybury (born November 20, 1848) was a Democratic member of the United States House of Representatives from Michigan. Representing Michigan’s 1st Congressional District, he served as a federal legislator during the 1880s, participating in national governance as a member of Congress.

Maybury held the office of Representative from December 3, 1883, to March 3, 1887, completing two terms in the U.S. House of Representatives. During this period, he served as a Democratic representative for Michigan, contributing to the work of the House over the course of the 48th and 49th Congresses. He is recorded as a historical member of Congress and is no longer in office.