• county
  • FIPS 06001
  • Largest town: Oakland

Alameda County, California

Alameda County had 1,649,060 residents in the Census Vintage 2024 estimate, on 737.5 square miles of land. It ranks 7th of 58 in California by population and 50th by land area.

Population
1,649,060
#7 of 58 in California · #22 in US
Area
737.5 sq mi
#50 of 58 in California · #1,200 in US
Density
2,236 / sq mi
#4 of 58 in California · #63 in US
Median household income
$119,230
#6 of 58 in California · #41 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Alameda County within California. Pin: Sacramento.

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Tools and pages that start from Alameda County

Alameda County population, land area and income

Alameda County had 1,649,060 residents in the Census Vintage 2024 estimate, on 737.5 square miles of land. It ranks 7th of 58 in California by population and 50th by land area. That works out to 2,236.1 people per square mile, 23.2 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in California has 187,274 residents, so Alameda County is 8.8 times that size.

Its SAIPE 2023 median household income of $119,230 is in the top tenth among 3,143 counties with an estimate.

National rank among 3,144

Population

1,649,060

3144th1st

22nd of 3,144 (US)

Land area

737 sq mi

3144th1st

1200th of 3,144 (US)

Density

2,236.1 / sq mi

3144th1st

63rd of 3,144 (US)

Median household income

$119,230

3143rd1st

41st of 3,143 (US)

Rank within California (58)

Population

1,649,060

58th1st

7th of 58 (CA)

Land area

737 sq mi

58th1st

50th of 58 (CA)

Density

2,236.1 / sq mi

58th1st

4th of 58 (CA)

Median household income

$119,230

58th1st

6th of 58 (CA)

How Alameda County's population changed since 2020

Alameda County lost 31,554 residents between the July 2020 and July 2024 estimates, a drop of 1.9%. That ranks 38th of 58 in California for growth. The median California county changed by -0.6%, and the state as a whole by -0.2%.

Since the April 2020 estimates base, Alameda County recorded 70,104 births and 46,692 deaths, a natural change of +23,412. Net international migration added +73,474 and net domestic migration, people moving to or from other US counties, came to -129,127. The largest single component was domestic migration, which removed 129,127 people.

1.68M20201.64M20211.64M20221.64M20231.65M2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
70,104
Deaths
46,692
Net international migration
+73,474
Net domestic migration
-129,127
Change, July 2023 to July 2024
+10,918

Where Alameda County is

The Census internal point of Alameda County is at 37.647100, -121.912500. It sits in UTM zone 10N. The map shades California's 58 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Alameda County outlined. Dots are towns of 1,000+ people with residents in it.

Los Angeles County: -2.4%Kings County: +1.4%Sierra County: -3.6%Riverside County: +4.3%Santa Barbara County: -0.8%San Bernardino County: +1.4%Nevada County: -0.1%Santa Clara County: +0.1%Yuba County: +6.7%Fresno County: +1.4%Plumas County: -4.7%Monterey County: -1.0%Amador County: +3.6%Alameda County: -1.9%Tulare County: +2.0%San Joaquin County: +4.5%Alpine County: -6.8%Siskiyou County: -3.4%Butte County: -0.9%Kern County: +1.8%San Diego County: -0.1%Sacramento County: +1.5%Ventura County: -1.0%Yolo County: +3.4%Lake County: -0.6%Napa County: -3.4%Tehama County: -1.9%San Francisco County: -5.4%El Dorado County: +0.8%Calaveras County: +2.5%Inyo County: -2.7%Shasta County: -0.6%Lassen County: -12.3%San Luis Obispo County: -0.0%Mariposa County: -0.5%Trinity County: -2.8%Contra Costa County: +0.6%Mendocino County: -2.4%Imperial County: +1.1%Santa Cruz County: -3.4%Placer County: +6.9%Orange County: -0.5%San Benito County: +7.2%Marin County: -1.9%San Mateo County: -2.6%Colusa County: +0.9%Del Norte County: -2.2%Solano County: +0.5%Glenn County: -2.0%Tuolumne County: -2.7%Sonoma County: -0.6%Humboldt County: -2.9%Mono County: -1.8%Stanislaus County: +0.6%Merced County: +4.9%Sutter County: -0.9%Madera County: +5.8%Modoc County: -2.1%
Change 2020 to 2024
  1. < -2.7%
  2. < -1.0%
  3. < -0.0%
  4. < +1.5%
  5. ≥ +1.5%
no data

Orange pin: Alameda County internal point. Dark pin: Sacramento.

Internal point

Decimal
37.647100, -121.912500
DMS
37°38'49.56"N 121°54'45.00"W
UTM
10N 595936.8E 4167217.4N
Geohash
9q9q1v6n2
Plus code
849WJ3WP+RX

Towns in Alameda County

14 incorporated places of 1,000+ people have residents in Alameda County, 1,504,993 people together, or 91% of the county. Each figure counts only the part of the town inside Alameda County; towns marked "part" extend into another county. The largest is Oakland with 443,554.

  1. 01Oakland443,554
  2. 02Fremont228,192
  3. 03Hayward158,440
  4. 04Berkeley121,749
  5. 05San Leandro86,571
  6. 06Livermore84,867
  7. 07Alameda78,795
  8. 08Pleasanton75,664
  9. 09Dublin70,544
  10. 10Union City66,196
  11. 11Newark46,254
  12. 12Albany19,439
  13. 13Emeryville13,912
  14. 14Piedmont10,816
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Alameda County

The Census 2024 county adjacency file lists 6 neighbors for Alameda County. The most populous is Santa Clara County, CA, with 1,926,325 residents. Distances run between Census internal points in a straight line.

Distance to Sacramento and the nearest big city

Sacramento is 68.2 miles NNE of Alameda County's internal point in a straight line. The nearest place of 100,000 or more is Hayward, CA (population 158,440), 10.6 miles away. The nearest place of 10,000 or more is Pleasanton, CA (population 75,664), 2.2 miles away.

Alameda County FIPS code

The FIPS code of Alameda County is 06001: state code 06 for California plus county code 001. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $119,230.

Questions people ask

What is the population of Alameda County, California?

The Census Vintage 2024 estimate for July 1, 2024 is 1,649,060. That is down 31,554 people (1.9%) from the July 2020 estimate of 1,680,614.

What is the FIPS code of Alameda County?

06001. The first two digits (06) are California; the last three (001) identify the county.

What is the largest town in Alameda County?

Oakland, with 443,554 residents inside Alameda County in 2024.

Which counties border Alameda County?

6 county-equivalents border it in the Census 2024 adjacency file: Santa Clara County, CA; Contra Costa County, CA; San Francisco County, CA; San Joaquin County, CA; San Mateo County, CA; Stanislaus County, CA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.