Stevinson is an unincorporated community and census-designated place in Merced County, California. It is located 21 miles west of Merced at an elevation of 85 feet. The population was 275 at the 2020 census, down from 313 at the 2010 census. The Stevinson post office opened in 1907. The name honors James J. Stevinson, who bought land nearby in 1852.The town is noted for its bullring, where Portuguese bullfighting is staged regularly.