Benjamin Gratz Brown (May 28, 1826 - December 13, 1885) was a Liberal Republican Governor of Missouri.
Brown was born in Lexington, Kentucky in 1826. He graduated from Transylvania University in Lexington in 1845 and from Yale College in 1847. He studied law.
He became a member of Missouri state house of representatives and served there between 1852 and 1858. He was an unsuccessful candidate for the Governor of Missouri in 1857. He tried to prevent Missouri from seceding from the Union in 1861. After that, he served in the Union Army during the Civil War. He served as a Senator from Missouri from 1863 to 1867. Then he served as the Governor between 1871 and 1873.
He was the vice presidential candidate under newspaper editor Horace Greeley in the presidential election of 1872. After Greeley died on November 30, before the results came out in the electoral college, 18 of the electoral votes that Greeley was supposed to get went to Brown. But the Republicans, incumbent president Ulysses S. Grant and Henry Wilson won the election.