Linn Boyd (November 22, 1800 – December 17, 1859) (also spelled "Lynn") was a prominent US politician of the 1840s and 1850s, and served as Speaker of the United States House of Representatives from 1851 to 1855.

Boyd played a key role in maneuvering the annexation of Texas through Congress during the term of President John Tyler in 1845.

Largely though his prominence in shepherding the compromise to passage, Boyd was elected Speaker of the House in 1851 and held that office until 1855.

After leaving the House, he was mentioned as a candidate for Vice President of the United States at the 1856 Democratic National Convention but was never officially nominated; the eventual nominee was fellow Kentuckian John C. Breckinridge.

Unionists held a two-thirds majority in both houses of the Kentucky General Assembly in the summer of 1861 and frequently overrode Magoffin's vetoes.

However, due to Linn Boyd's death, the person next in line to become Governor of Kentucky was Speaker of the Senate John F. Fisk, whom Magoffin thought unacceptable.