John Miller Dickey (December 15, 1806 – March 2, 1878) was an American Presbyterian minister. He and his wife, Sarah Emlen Cresson, a Quaker, founded Ashmun Institute on May 24, 1854, which was renamed Lincoln University in 1866 following the assassination of President Abraham Lincoln. They named the school after Jehudi Ashmun, a religious leader and social reformer. They founded the school for the education and religious training of African American men, whose opportunities were limited. Lincoln University is the oldest historically black college or university in the United States.
Dickey served as the first president of Ashmun Institute from 1854 to 1856 and continued to chair its board of trustees until his death twenty-two years later.