Home Cities United States San Diego County

Population of San Diego County, United States US flag

Large city with 3,298,634 residents in California, United States.

3,298,634
Residents (2026)
#414
World Ranking
#7
In United States (of 867)

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

CitySan Diego County
CountryUS flag United States
Population3,298,634
Global Rank#414
Rank in United States#7 of 867 cities
City Categorylarge city
RegionCalifornia
Latitude33.02
Longitude-116.77
Data Year2026

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 US flag 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 US flag

View all cities in United States

Largest Cities in United States US flag

# 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.

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