San Diego County is a city located in United States. According to the latest available data (2026), the population of San Diego County is approximately 3,298,634 residents. The city is one of the major urban areas in United States.
San Diego County City Statistics
| City | San Diego County |
| Country |  United States |
| Population | 3,298,634 |
| Latitude | 33.02 |
| Longitude | -116.77 |
| Region | California |
| Data Year | 2026 |
Where is San Diego County located?
San Diego County is located in United States, in the California region, at approximately 33.02 latitude and -116.77 longitude.
Nearby Cities
Los Angeles
United States — Pop. 3,898,747
Los Angeles County
United States — Pop. 10,014,009
Maricopa County
United States — Pop. 4,420,568
Guadalajara metropolitan area
Mexico — Pop. 5,350,000
Harris County
United States — Pop. 4,731,145
Mexico City
Mexico — Pop. 9,209,944
Catemaco Municipality
Mexico — Pop. 3,453,456
Cook County
United States — Pop. 5,275,541
Other Cities in United States
Largest Cities in United States
| # | City | Population |
|---|---|---|
| 4 | Los Angeles County | 10,014,009 |
| 5 | New York City | 8,804,190 |
| 6 | Cook County | 5,275,541 |
| 1 | Harris County | 4,731,145 |
| 2 | Maricopa County | 4,420,568 |
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.
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