Sacramento is the capital city of California and the seat of government of Sacramento County. It is at the confluence of the Sacramento River and the American River in the northern portion of California’s expansive Central Valley. With an estimated 2016 population of 495,234, it is the sixth-largest city in California and the 35th largest city in the United States. Sacramento is the core cultural and economic center of the Sacramento metropolitan area which includes seven counties with an estimated 2009 population of 2,527,123. Its metropolitan area is the fourth largest in California after the Greater Los Angeles Area, San Francisco Bay Area, and the San Diego metropolitan area, as well as the 27th largest in the United States. Sacramento was cited by Time magazine as America’s most ethnically and racially integrated city in 2002.
Sacramento became a city through the efforts of the Swiss immigrant John Sutter, Sr., his son John Sutter, Jr., and James W. Marshall. Sacramento grew quickly thanks to the protection of Sutter’s Fort, which was established by Sutter in 1839. During the California Gold Rush, Sacramento was a major distribution point, a commercial and agricultural center, and a terminus for wagon trains, stagecoaches, riverboats, the telegraph, the Pony Express, and the First Transcontinental Railroad.
California State University, Sacramento, more commonly known as Sacramento State or Sac State, is the largest local university. It is one of the 23 campuses of the California State University system. Drexel University Sacramento is located in Downtown, Sacramento. University of the Pacific’s McGeorge School of Law is in the Oak Park neighborhood. In addition, the University of California, Davis is in nearby Davis, 15 miles (24 km) west of the capital. The UC Davis Medical Center, a world-renowned research hospital, is located in the city of Sacramento.
According to the 2010 US Census, the population density of Sacramento was 4,660.0 people per square mile (1,799.2/km²). The age distribution of the city was follows: 116,121 people (24.9%) were under the age of 18, 52,438 people (11.2%) aged 18 to 24, 139,093 people (29.8%) aged 25 to 44, 109,416 people (23.5%) aged 45 to 64, and 49,420 people (10.6%) who were 65 years of age or older. The median age was 33.0 years. For every 100 females there were 94.9 males. For every 100 females age 18 and over, there were 92.2 males.