Merced (/mɜːrˈsɛd/; Spanish for "Mercy") is a city in, and the county seat of, Merced County, California, United States, in the San Joaquin Valley. As of the 2020 Census, the city had a population of 86,333, up from 78,958 in 2010. Incorporated on April 1, 1889, Merced is a charter city that operates under a council–manager government. It is named after the Merced River, which flows nearby. In 2005, the city became home to the 10th University of California campus, University of California, Merced (UC Merced), the first research university built in the U.S. in the 21st century.