William P. Bryant (August 3, 1806 – October 10, 1860) was an American jurist from Kentucky. He served as the first chief justice of the Oregon Supreme Court in the Oregon Territory. United States President James K. Polk appointed Bryant, of Indiana, to the court once the Oregon Territory was established in 1848. In Indiana he served in both houses of the Indiana General Assembly and was a county judge. Bryant also fought in the Black Hawk War against Native Americans.