Dixon is a city in northern Solano County, California, United States, located 23 miles from the state capital, Sacramento. It has a hot-sum…Dixon is a city in northern Solano County, California, United States, located 23 miles from the state capital, Sacramento. It has a hot-summer mediterranean climate on the Köppen climate classification scale. Its population was 18,988 at the 2020 census. Other nearby cities include Vacaville, Winters, Davis, Woodland, and Rio Vista.