Foster City, California
Incorporated place · Latest: 2024
Safe Democratic — shifted 7.0pp toward Republicans in 2024 — 34K residents
Race & ancestry
| Group | % |
|---|---|
White (Non-Hispanic) | 31.8% |
Hispanic / Latino | 7.2% |
Black / African American | 1.5% |
Asian | 53.5% |
Native American / Alaska Native | 0.2% |
Native Hawaiian / Pacific Islander | 0.6% |
Multiracial / Other | 5.3% |
Key demographics
| Metric | Value |
|---|---|
| Median household income | — |
| Bachelor's or higher | — |
| English only at home | — |
| Other language at home | — |
| Foreign-born | — |
Presidential results
| Year | Result |
|---|---|
| 2024 | Harris+47.4 |
| 2020 | Biden+54.4 |
| 2016 | Clinton+51.5 |
| 2012 | Obama+42.5 |
| 2008 | Obama+41.1 |
Foster City, California is a city that has a population of 33,805. In the 2024 presidential election, it voted Democratic with a margin of D+47.4. Akashic Edge tracks 5 presidential elections here, dating back to 2008.
| Year | Dem % | Rep % | Margin | Swing |
|---|---|---|---|---|
| 2024 | 71.7% | 24.3% | D+47.4 | R+7.0 |
| 2020 | 76.3% | 21.9% | D+54.4 | D+2.8 |
| 2016 | 73.3% | 21.8% | D+51.5 | D+9.0 |
| 2012 | 71.2% | 28.8% | D+42.5 | D+1.4 |
| 2008 | 70.4% | 29.4% | D+41.1 | — |
What defines Foster City?
It has a majority-minority electorate where racial demographics are the primary driver of partisan lean.
Similar cities
Nearest neighbors matched on the same place-page feature set used across the dossier system.
Millbrae City
Educated urban democratic 3
Cupertino City
Educated urban democratic 3
Sunnyvale City
Educated urban democratic 3
Leonia Borough
Educated urban democratic 3
Belmont City
Educated urban democratic 3
Burlingame City
Educated urban democratic 3
Santa Clara City
Educated urban democratic 3
Dublin City
Educated urban democratic 3
Located In
Foster City sits inside these higher-level geographies.
Ask the Historian
Explore Foster City's political evolution with the Historian
Key Insights
High-confidence patterns distilled from this geography's election history.
- Has voted Democratic in the last 5 presidential elections
- Latest election (2024) was a Democratic landslide with a 47.4% margin
- Turnout decreased by 6.4 percentage points since the previous presidential election
Who Lives Here
A race-first Census view with ancestry expansion where source coverage is strong enough to support detail.
Census race profile
Major Census race and ethnicity groups shown as a share of total population.
| Group | Foster City | National |
|---|---|---|
Asian | 53.5% | 6.0% |
White (Non-Hispanic) | 31.8% | 57.4% |
Hispanic / Latino | 7.2% | 19.3% |
Multiracial / Other | 5.3% | 4.0% |
Black / African American | 1.5% | 12.2% |
Native Hawaiian / Pacific Islander | 0.6% | 0.2% |
Native American / Alaska Native | 0.2% | 0.9% |
Method notes
Who lives in Foster City? 33,805 residents as of the 2020 Census.
Demographics
Read this geography's profile in three layers: local, state (where available), and national baseline.
Population & electorate
Scale, voting-age share, and this geography's footprint inside the national electorate.
Total population
34K
Share of U.S. population
0.01%
Voting-age population
78.6%
Economic profile
Income, attainment, and ownership indicators that often shape coalition structure and turnout behavior.
Median household income
N/A
Poverty rate
N/A
College degree
N/A
Homeownership
N/A
Community profile
Age structure, language use, and nativity signals that explain how this geography differs from state and nation.
Median age
N/A
Age 18–29
N/A
Age 65+
N/A
Foreign born
N/A
Non-English at home
N/A
English only
N/A
Turnout in Foster City
Estimated using 2020 Census voting-age population.
53.2%
-6.4pp
26,565
2008–2024
How competitive is Foster City?
Safe DAvg margin: D+51.1 (last 3 elections)
2008
D+41.1
2012
D+42.5
2016
D+51.5
2020
D+54.4
2024
D+47.4
13.3pp
0
D+47.4
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