William Logan (December 8, 1776 – August 8, 1822) was a United States Senator from Kentucky.

He was delegate to Kentucky's constitutional convention in 1799 and worked as a state commissioner in siting the new Barren County's seat of government (at Glasgow, a new settlement probably named for the Scottish hometown of Logan's father[1]) the same year.

Logan was a member of the Kentucky House of Representatives from 1803 to 1806 and again in 1808, and served as speaker two terms.

Logan was elected as a Democratic Republican to the United States Senate and served from March 4, 1819, to May 28, 1820, when he resigned to run for governor in 1820.

(He did not succeed, instead serving as a commissioner of the Kentucky River Company.)