Paul Brown Bost (December 7, 1904 – December 21, 1987) was an American racing driver.^[1][2] He raced in events from 1929 and appeared on both dirt or board oval tracks. He continued racing until 1935, when he was a relief driver for Mauri Rose at the Indianapolis 500. In 1935 he married and fulfilled a pledge to his new wife to cease racing promptly upon marriage.^[3]