James Brown Ray (February 19, 1794 – August 4, 1848) was an Indiana politician and the only Indiana Senate president pro tempore to be elevated to governor of the State of Indiana. Ray served during a time when the state transitioned from personal politics to political parties, but never joined a party himself. At age 31 he became the state's youngest governor and served from 1825 to 1831, the longest period for an Indiana governor under the state constitution of 1816.