when did california become part of the united states
California What is now California was first settled by various Native Californian tribes before being explored by a number of European expeditions during the 16th and 17th centuries. The Spanish Empire then claimed it as part of Alta California in their New Spain colony. The area became a part of Mexico in 1821 following its successful war for independence but was ceded to the United States in 1848 after the Mexican–American War. The western portion of Alta California then was organized and admitted as the 31st state on September 9, 1850. The California Gold Rush starting in 1848 led to dramatic social and demographic changes, with large-scale emigration from the east and abroad with an accompanying economic boom.
Sacramento, California The California State Legislature, with the support of Governor John Bigler, moved to Sacramento in 1854. The capital of California under Spanish (and, subsequently, Mexican) rule had been Monterey, where in 1849 the first Constitutional Convention and state elections were held. The convention decided that San Jose would be the new state's capital. After 1850, when California's statehood was ratified, the legislature met in San Jose until 1851, Vallejo in 1852, and Benicia in 1853, before moving to Sacramento. In the 1879 Constitutional Convention, Sacramento was named to be the permanent state capital.