Guides | Open Data - California

data california California is a state in United States. The population in California was 39,431,263 in 2025. The median age in California was 37.6 in 2025. The median income in California was $41,901 in. USGS Water Data for the Nation Site provides access to water data from over 1.5 million sites in all 50 States and additional border and territorial sites.

data jpn, California average gas prices ; Current Avg. $4.895, $5.110 ; Avg. $4.910, $5.115 ; Week Ago Avg. $4.915, $5.116 ; Month Ago Avg. $4.836, $5.043.