About San Diego County
San Diego County is a large city located in United States, in the California region. According to the latest available data (2026), the population of San Diego County is approximately 3,298,634 residents, making it the #7 most populous city in United States.
Globally, San Diego County ranks #414 among the world's most populated cities. With over 1 million residents, San Diego County plays an important role as an economic and cultural center in United States.
San Diego County City Statistics
| City | San Diego County |
| Country |  United States |
| Population | 3,298,634 |
| Global Rank | #414 |
| Rank in United States | #7 of 867 cities |
| City Category | large city |
| Region | California |
| Latitude | 33.02 |
| Longitude | -116.77 |
| Data Year | 2026 |
Population Comparison
To put San Diego County's population of 3,298,634 into perspective:
- San Diego County has approximately 3.3 million residents.
- This makes it comparable in size to cities like Berlin or Madrid.
Where is San Diego County Located?
San Diego County is located in United States, in the California region, at coordinates 33.02° latitude and -116.77° longitude. San Diego County sits in the subtropics, typically enjoying warm temperatures year-round.
Nearby Cities
Other Cities in United States
Largest Cities in United States
| # | City | Population |
|---|---|---|
| 1 | Travis County | 1,290,188 |
| 2 | Hennepin County | 1,281,565 |
| 3 | Oakland County | 1,274,395 |
| 4 | Cuyahoga County | 1,264,817 |
| 5 | Allegheny County | 1,250,578 |
Frequently Asked Questions
What is the population of San Diego County?
The population of San Diego County is approximately 3,298,634 residents according to the latest available data (2026).
Where is San Diego County located?
San Diego County is located in United States at approximately 33.02° latitude and -116.77° longitude.
Is San Diego County one of the largest cities in United States?
With a population of 3,298,634, San Diego County is one of the major urban areas in United States. It ranks #7 out of 867 cities in the country.
