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5 hours ago · San Diego County ( / ˌsæn diˈeɪɡoʊ / ⓘ ), officially the County of San Diego ( Spanish: Condado de San Diego ), is a county in the southwestern corner of the U.S. state of California. As of the 2020 census, the population was 3,298,634, [7] making it California's second-most populous county and the fifth-most populous in the United States.
