Benjamin Stark (June 26, 1820 – October 10, 1898) was an American merchant and politician in Oregon. A native of Louisiana, he purchased some of the original tracts of land for the city of Portland. He later served in the Oregon House of Representatives before appointment to the United States Senate in 1860 after the death of Edward D. Baker. A Democrat, Stark served in the Senate from 1861 to 1862. He later served in the Connecticut House of Representatives.