Ethan Allen Brown (also known as Ethan A. Brown) (July 4, 1776 - February 24, 1852) was a Democratic-Republican politician. He served as the 7th Governor of Ohio.

Brown was born on Independence Day in Darien, Connecticut to a Revolutionary War veteran. He moved near Cincinnati, Ohio in 1803. He was appointed to the Ohio Supreme Court in 1810 and was re-elected in 1817. Brown was elected to the governorship a year later and was re-elected in 1820. He resigned on January 3, 1822 to take office in the U.S. Senate after the death of William A. Trimble. He was defeated for re-election in 1824 by William Henry Harrison. An active supporter of Andrew Jackson, Brown was appointed Charge d'Affaires to Brazil in 1830 and served for four years. He retired to a family farm in Indiana in 1836, and later served a single term in the Indiana House of Representatives from 1841-1843.