San Diego County Population (2026)
Population of San Diego County with area, density and how it compares to nearby places.
Population of San Diego County
San Diego County ranks #2 by population among 6 comparable places in this atlas.
Quick facts about San Diego County
| Type | County |
|---|---|
| State | California |
| Country | United States |
| Continent | North America |
| Coordinates | 32°42′56.5″N 117°9′40″W (32.7157, -117.1611) |
| Population | 3.280.000 |
| Local time | 8:33 PM (UTC-07:00) |
| Best months | April, May, June, July, August, September and October |
| Climate | Mediterranean |
Summary
San Diego County is a county in California. San Diego County is a county in the United States. It has a population of about 3.3 million.
Right now it is 70°F (21°C) in San Diego County with overcast. It feels like 73°F. Today runs from 69°F to 78°F. Chance of precipitation is 0%. Sightseeing conditions score 7.5/10 - good conditions.
The best time to visit San Diego County is April, May, June, July, August, September and October. The climate is Mediterranean. January, February and March tend to be the least comfortable months. August is the warmest month with average highs near 78°F, while January is the coldest with lows near 48°F.
The closest major airport is San Diego International Airport (SAN), about 2 mi away. Nearby highlights include Coronado Beach, Anza-Borrego Desert State Park, Disneyland Resort and Joshua Tree National Park.
In plain terms. Today is about average for September. The forecast high of 78°F is in line with the 76°F typical for this month. The best window to be outside is roughly 10 AM to 1 PM, when temperature, rain chance and wind line up best. outdoors is the strongest bet in San Diego County today at 9.8/10. Visibility is down to 0,3 mi - use low beams and leave extra following distance.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Map of San Diego County
Interactive map with nearby places. Switch between street, terrain and satellite views.
Coordinates: 32°42′56.5″N 117°9′40″W (32.7157, -117.1611)
Explore San Diego County
Every topic we hold for this place, and the same topic for the places around it.
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Frequently asked questions
Where is San Diego County?
San Diego County is a county in California. Its coordinates are 32.7157, -117.1611. It lies in North America.
What is the weather like in San Diego County right now?
It is currently 70°F (21°C) with overcast. Humidity is 79% and wind is 3 mph.
When is the best time to visit San Diego County?
April, May, June, July, August, September and October offer the most comfortable conditions in San Diego County, which has a Mediterranean climate. January, February and March are usually the hardest months for outdoor plans.
What time zone is San Diego County in?
San Diego County observes America/Los_Angeles (UTC-07:00). The local time is 8:33 PM.
How many people live in San Diego County?
San Diego County has a population of approximately 3.3 million.
What is the nearest airport to San Diego County?
The closest airports are San Diego International Airport (SAN), 2 mi away, Los Angeles International Airport (LAX), 111 mi away and Harry Reid International Airport (LAS), 259 mi away.
What are the top things to do in San Diego County?
Popular options include Coronado Beach, Anza-Borrego Desert State Park, Disneyland Resort, Joshua Tree National Park, Santa Monica State Beach and Hollywood Sign.
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| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated September 20, 2026 at 8:33 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
