San Diego is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. With a population of over 1.3 million, it is the eighth-most populous city in the United States and the second-most populous in the state of California. San Diego is the seat of San Diego County, which has a population of nearly 3.3 million. It is known for its mild year-round Mediterranean climate, extensive beaches and parks, long association with the United States Navy, and recent emergence as a healthcare and biotechnology development center.
Tijuana is the most populous city in the state of Baja California, located on the northwestern Pacific Coast of Mexico. Tijuana is the municipal seat of the Tijuana Municipality and the hub of the Tijuana metropolitan area. It has a close proximity to the Mexico–United States border which is part of the San Diego–Tijuana metro area.
Baja California, officially the Free and Sovereign State of Baja California, is a state in Mexico. It is the northwesternmost of the 32 federal entities of Mexico. Before becoming a state in 1952, the area was known as the North Territory of Baja California. It has an area of 70,113 km2 (27,071 sq mi) and comprises the northern half of the Baja California peninsula, north of the 28th parallel, plus oceanic Guadalupe Island. The mainland portion of the state is bordered on the west by the Pacific Ocean; on the east by Sonora, the U.S. state of Arizona, and the Gulf of California; on the north by the U.S. state of California; and on the south by Baja California Sur.
Rosarito is a coastal city in Playas de Rosarito Municipality, Baja California, on the Pacific Coast of Mexico. As of 2010, the city had a population of 65,278. Located 10 miles (16 km) south of the US–Mexico border, Rosarito is a part of the greater San Diego–Tijuana region and one of the westernmost cities in Mexico. Rosarito is a major tourist destination, known for its beaches, resorts, and events like Baja Beach Fest.
The Kumeyaay, also known as 'Iipai-Tiipai or by the historical Spanish name Diegueño, is a tribe of Indigenous peoples of the Americas who live at the northern border of Baja California in Mexico and the southern border of California in the United States. They are an indigenous people of California.
Tecate is a city in Tecate Municipality, Baja California. It is across the Mexico–US border from Tecate, California. As of 2019, the city had a population of 108,860 inhabitants, while the metropolitan area has a population of 132,406 inhabitants. Tecate is part of the San Diego–Tijuana metropolitan region and the largest city between Tijuana and Mexicali. Tecate is a regional economic hub and popular tourist destination, known as home to the Tecate Port of Entry and to Tecate beer.
El Presidio Real de San Diego is a historic fort in San Diego, California. It was established on May 14, 1769, by Gaspar de Portolá, leader of the first European land exploration of Alta California—at that time an unexplored northwestern frontier area of New Spain.
The South Bay, also known as South County, is a region in southwestern San Diego County, California, consisting of the cities and unincorporated communities of Bonita, Chula Vista, East Otay Mesa, Imperial Beach, Lincoln Acres, National City, and South San Diego.
The history of San Diego began in the present state of California, when Europeans first began inhabiting the San Diego Bay region. As the first area of California in which Europeans settled, San Diego has been described as "the birthplace of California". Explorer Juan Rodríguez Cabrillo was the first European to discover San Diego Bay in 1542, roughly 200 years before other Europeans settled the area. Native Americans such as the Kumeyaay people had been living in the area for as long as 12,000 years prior to any European presence. A fort and mission were established in 1769, which gradually expanded into a settlement under first Spanish and then Mexican rule.
San Diego–Tijuana is an international transborder agglomeration, straddling the border of the adjacent North American coastal cities of San Diego, California, United States, and Tijuana, Baja California, Mexico. The 2020 population of the region was 5,456,577, making it the largest bi-national conurbation shared between the United States and Mexico, and the second-largest shared between the US and another country. The conurbation consists of San Diego County, in the United States and the municipalities of Tijuana, Rosarito Beach (126,980), and Tecate (108,440) in Mexico. It is the third most populous region in the California–Baja California region, smaller only than the metropolitan areas of Greater Los Angeles and the San Francisco Bay Area.
Point Loma is a seaside community in San Diego, California, United States. Geographically it is a hilly peninsula that is bordered on the west and south by the Pacific Ocean, the east by San Diego Bay and Old Town, and the north by the San Diego River. Together with the Silver Strand/Coronado peninsula, the Point Loma peninsula defines San Diego Bay and separates it from the Pacific Ocean. The term "Point Loma" is used to describe both the neighborhood and the peninsula.
Naval Base Point Loma (NBPL) is a United States Navy base in Point Loma, a neighborhood of San Diego, California. It was established on 1 October 1998 when Navy facilities in the Point Loma area of San Diego were consolidated under Commander, Navy Region Southwest. Naval Base Point Loma consists of seven facilities: Submarine Base, Naval Mine and Anti-Submarine Warfare Command, Fleet Combat Training Center Pacific, Naval Information Warfare Systems Command (NAVWAR), Naval Information Warfare Center Pacific, the Fleet Intelligence Command Pacific and Naval Consolidated Brig, Miramar. These close-knit commands form a diverse and highly technical hub of naval activity. The on-base population is around 22,000 Navy and civilian personnel.
Old Town is a neighborhood in San Diego, California. It contains 230 acres (93 ha) and is bounded by Interstate 8 on the north, Interstate 5 on the west, Mission Hills on the east and south. It is the oldest settled area in San Diego and is the site of the first European settlement in present-day California. It contains Old Town San Diego State Historic Park and Presidio Park, both of which are listed on the National Register of Historic Places.
Naval Training Center San Diego is a former United States Navy base located at the north end of San Diego Bay, used as a training facility, commonly known as "boot camp". The Naval Training Center site is listed on the National Register of Historic Places, and many of the individual structures are designated as historic by the City of San Diego.
San Diego County, officially the County of San Diego, is a county in the southwest corner of the U.S. state of California, north to its border with Mexico. As of the 2020 census, the population was 3,298,634; it is the second-most populous county in California and the fifth-most populous in the United States. Its county seat is San Diego, the second-most populous city in California and the eighth-most populous in the United States. It is the southwesternmost county in the 48 contiguous United States, and is a border county. It is home to 18 Indian reservations, the most of any county in the United States. There are 16 military installations of the Navy, Marine Corps, and Coast Guard in the county.
The San Pasqual Band of Diegueño Mission Indians of California is a federally recognized tribe of Kumeyaay people, who are sometimes known as Mission Indians.
The following is a timeline of the history of the city of San Francisco, California, United States.
The following is a timeline of the history of the city of Tijuana, Baja California, Mexico.
The following is a timeline of the history of the city of Oakland, Alameda County, California, United States.
The following is a general historical timeline of the city of Los Angeles, California in the United States of America.
Californiaportal 
