Richard Taylor Jacob (March 13, 1825 – September 13, 1903) was an American attorney and politician, elected as 17th Lieutenant Governor of Kentucky (1863–4). Although a slaveholder, he was loyal to the Union during the American Civil War, raising the 9th Kentucky Cavalry for its defense. The lieutenant governorship remained vacant until the election of 1867. In his later years, Jacob became a judge, joined the Republican Party, and served as Louisville parks commissioner.