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History of San Diego Timeline
(1542 - Present)The history of San Diego spans thousands of years, beginning with the indigenous Kumeyaay people. European contact began in 1542 with Juan Rodríguez Cabrillo, followed by the founding of Mission San Diego de Alcalá in 1769, the first Spanish mission in California. San Diego later became part of Mexico after independence in 1821, then was ceded to the United States following the Mexican-American War in 1848. Incorporated as California's first city in 1850, it grew rapidly through the 20th century driven by the U.S. Navy, tourism, and biotechnology. More Less
Indigenous and Spanish Era
Cabrillo lands at San Diego Bay
Sep 28, 1542
Portuguese explorer Juan Rodríguez Cabrillo sailing for Spain became the first European to land at San Diego Bay, naming it San Miguel. His arrival marked the first European contact with the indigenous peoples of the area.
Image source: San Diego
Vizcaíno maps the bay as San Diego
Nov 10, 1602
Spanish navigator Sebastián Vizcaíno surveyed the California coast and renamed the harbor San Diego in honor of Saint Didacus of Alcalá, the name that would endure to the present day.
Image source: Sebastián Vizcaíno
Portolá expedition arrives in San Diego
Jul 14, 1769
Governor Gaspar de Portolá led the first overland Spanish expedition into Alta California, arriving at San Diego Bay and establishing the first European settlement in what is now California.
Image source: Portolá expedition
Mission San Diego de Alcalá founded
Jul 16, 1769
Father Junípero Serra founded Mission San Diego de Alcalá on Presidio Hill, the first of twenty-one Spanish missions in California. It served as a center for converting local Kumeyaay to Christianity and anchoring Spanish colonial presence.
Image source: Mission San Diego de Alcalá
Presidio of San Diego established
May 14, 1770
A Spanish military fort was built atop Presidio Hill overlooking Old Town, becoming the first permanent European settlement on the Pacific coast of the United States.
Image source: Presidio of San Diego
Mission relocated to Mission Valley
Aug 1774
Mission San Diego de Alcalá was moved from Presidio Hill to its current location in Mission Valley to be closer to water and arable land, expanding agricultural operations and the neophyte population.
Kumeyaay revolt against Mission San Diego
Nov 4, 1775
Hundreds of Kumeyaay warriors attacked and burned Mission San Diego de Alcalá, one of the largest indigenous uprisings in Alta California, protesting Spanish encroachment on their lands and forced conversion.
Mexican Era
Pueblo de San Diego established
Jan 1, 1835
Following Mexico's independence from Spain, secularization laws transformed the mission lands, and San Diego was formally incorporated as a Mexican pueblo with Juan María Osuna elected its first alcalde.
Image source: Old Town, San Diego
American Settlement and Cityhood
Battle of San Pasqual
Dec 6, 1846
During the Mexican–American War, U.S. forces under General Stephen Kearny clashed with Californio lancers led by Andrés Pico near present-day Escondido. The bloody engagement ended inconclusively but marked a key moment in the American conquest of California.
Image source: Battle of San Pasqual
California gold rush sparks growth
Jan 24, 1848 - 1855
News of gold discovery drew prospectors through San Diego, which served as a supply port, though the town's growth lagged behind northern California during this era.
Image source: California Gold Rush
Key Facts
- The Kumeyaay people inhabited the San Diego region for over 10,000 years before European contact.
- Juan Rodríguez Cabrillo became the first European to explore San Diego Bay in 1542, naming it San Miguel.
- Mission San Diego de Alcalá, founded by Father Junípero Serra on July 16, 1769, was the first of California's 21 Spanish missions.
- San Diego was incorporated as the first city in California on March 27, 1850, shortly after the state joined the Union.
- The establishment of naval bases in the early 20th century made San Diego a major military hub, shaping much of its economy and growth.
Source
This History of San Diego timeline was generated with the help of AI, using information found on the internet.
We work hard to keep these timelines accurate, but mistakes do get through. If you spot one, email us at [email protected] and we'll fix it for future visitors.
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