John Hervey Crozier (February 10, 1812 – October 25, 1889) was an American attorney and politician active primarily in Knoxville, Tennessee, USA, during the mid-nineteenth century.
Described as "an orator of uncommon brilliancy" and "one of the brainiest men ever sent by Tennessee to congress," Crozier represented Tennessee's 3rd congressional district in the United States House of Representatives from 1845 to 1849.
While originally a member of the Whig Party, Crozier switched his allegiance to the Democratic Party in the 1850s, and supported the Confederacy during the Civil War.
Crozier retired from public life after the war, and spent his remaining years engaged in scholarly pursuits.