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San Diego is a major coastal city in Southern California, located near the border with Mexico and known for its mild climate and natural harbor. The city has a population estimated at 1,413,210 inhabitants (2026 estimate). Founded in 1769 with the establishment of a Spanish mission, San Diego is considered the birthplace of California. It later developed as a key naval and military center, as well as a hub for tourism and biotechnology.
Today, it is one of the largest cities in the United States and an important economic center. Notable landmarks include Balboa Park, home to numerous museums and the famous San Diego Zoo, the historic Gaslamp Quarter, and the scenic La Jolla Cove. San Diego has also been the birthplace of several notable figures, including actress Raquel Welch, actress Cameron Diaz, and musician Tom Waits.
San Diego in United States
117.2° W
San Diego Population Evolution
The population of San Diego in 2026 is estimated to 1,413,210 inhabitants. This estimate is taken from our extrapolation of available data and not an official estimate.
Population Summary
| Year | Population | Change |
|---|---|---|
| 1850 | 500 | |
| 1900 | 17,700 | +3,440.0% |
| 1940 | 203,341 | +1,048.8% |
| 1990 | 1,110,549 | +446.2% |
| 2024 | 1,404,452 | +26.5% |
Interactive Map of San Diego
What to see in San Diego
San Diego Zoo
Balboa Park
La Jolla
neighborhoodMission San Diego de Alcalá
Spanish missionEl Cortez
Apartment HotelBalboa Theatre
movie theaterGaslamp Quarter
Historic DistrictFamous People Born in San Diego
Raquel Welch
actorAmerican actress
Tom Waits
singer-songwriterAmerican singer-songwriter and actor
Tony Hawk
skateboarderAmerican professional skateboarder and actor
Cameron Diaz
actorAdam Driver
actorAmerican actor
Sister Cities of San Diego
Sister cities, also known as twin cities, are formal partnerships between cities in different countries to promote cultural and commercial ties.
This list is based on publicly available structured data and may differ slightly from official municipal publications.
| City | Country | Population |
|---|---|---|
| Yantai | 🇨🇳 People's Republic of China | 7,102,116 |
| Yokohama | 🇯🇵 Japan | 3,757,630 |
| Taichung | 🇹🇼 Taiwan | 3,033,885 |
| Perth | 🇦🇺 Australia | 2,288,650 |
| Tijuana | 🇲🇽 Mexico | 1,964,788 |
| Warsaw | 🇵🇱 Poland | 1,862,402 |
| León de Los Aldama | 🇲🇽 Mexico | 1,579,803 |
| Panama City | 🇵🇦 Panama | 1,540,000 |
| Campinas | 🇧🇷 Brazil | 1,213,792 |
| Marseille | 🇫🇷 France | 877,215 |
| Jeonju | 🇰🇷 South Korea | 653,055 |
| Vladivostok | 🇷🇺 Russia | 591,628 |
| Edinburgh | 🇬🇧 United Kingdom | 488,050 |
| Jalalabad | 🇦🇫 Afghanistan | 263,312 |
| Alcalá de Henares | 🇪🇸 Spain | 203,208 |
| Tema | 🇬🇭 Ghana | 161,612 |
| Cavite City | 🇵🇭 Philippines | 98,673 |
Learn more about San Diego
Other facts about San Diego
Sources & References
- Wikidata
- United States Census Bureau (accessed on 16 March 2026)