San Mateo County, CA
Demographics & Statistics
Updated: 2025-10-25
Updated: 2025-10-25
Life in San Mateo County research summary. HomeSnacks has been researching the quality of life in San Mateo County over the past eight years using Census data, FBI crime data, cost of living data, and other primary sources. Based on the most recently available data, we found the following about life in San Mateo County:
The population in San Mateo County is 745,100.
The median home value in San Mateo County is $1,532,712.
The median income in San Mateo County is $156,000.
The median rent in San Mateo County is $2,893.
The unemployment rate in San Mateo County is 4.5%.
The poverty rate in San Mateo County is 6.5%.
The average high in San Mateo County is 64.1° and there are 54.7 inches of rainfall annually.
The average high in San Mateo County is 64.1°.
There are 99.41 nice days each year.
Expect an average of 54.7 inches of rain each year with 0.0 inches of snow.
There is an average of 6:14 hours of sun each day in San Mateo County.
| Stat | San Mateo County |
|---|---|
| Mean High | 64.1 |
| Nice Days | 99.41 |
| Rainfall | 54.7 |
| Snowfall | 0.0 |
| Sunny Hours | 6:14 |
The current population in San Mateo County is 745,100. The population has decreased -0.6% from 2019.
| Year | Population | % Change |
|---|---|---|
| 2023 | 762,488 | -0.4% |
| 2022 | 765,623 | -0.2% |
| 2021 | 767,423 | - |
San Mateo County is 50.2% female with 373,886 female residents.
San Mateo County is 49.8% male with 371,214 male residents.
| Gender | San Mateo County | CA | USA |
|---|---|---|---|
| Female | 50.2% | 50.0% | 50.5% |
| Male | 49.8% | 50.0% | 49.5% |
San Mateo County is:
35.8% White with 266,446 White residents.
2.1% African American with 15,321 African American residents.
0.1% American Indian with 898 American Indian residents.
30.5% Asian with 226,967 Asian residents.
1.1% Hawaiian with 8,110 Hawaiian residents.
0.8% Other with 6,264 Other residents.
4.8% Two Or More with 35,716 Two Or More residents.
24.9% Hispanic with 185,378 Hispanic residents.
| Race | San Mateo County | CA | USA |
|---|---|---|---|
| White | 35.8% | 34.6% | 58.2% |
| African American | 2.1% | 5.3% | 12.0% |
| American Indian | 0.1% | 0.3% | 0.5% |
| Asian | 30.5% | 15.1% | 5.7% |
| Hawaiian | 1.1% | 0.3% | 0.2% |
| Other | 0.8% | 0.5% | 0.5% |
| Two Or More | 4.8% | 4.1% | 3.9% |
| Hispanic | 24.9% | 39.8% | 19.0% |
2.6% of households in San Mateo County earn Less than $10,000.
1.6% of households in San Mateo County earn $10,000 to $14,999.
2.9% of households in San Mateo County earn $15,000 to $24,999.
3.1% of households in San Mateo County earn $25,000 to $34,999.
5.6% of households in San Mateo County earn $35,000 to $49,999.
8.9% of households in San Mateo County earn $50,000 to $74,999.
8.4% of households in San Mateo County earn $75,000 to $99,999.
15.4% of households in San Mateo County earn $100,000 to $149,999.
12.5% of households in San Mateo County earn $150,000 to $199,999.
39.0% of households in San Mateo County earn $200,000 or more.
| Income | San Mateo County | CA | USA |
|---|---|---|---|
| Less than $10,000 | 2.6% | 4.4% | 4.9% |
| $10,000 to $14,999 | 1.6% | 3.0% | 3.6% |
| $15,000 to $24,999 | 2.9% | 5.2% | 6.6% |
| $25,000 to $34,999 | 3.1% | 5.5% | 6.8% |
| $35,000 to $49,999 | 5.6% | 8.4% | 10.4% |
| $50,000 to $74,999 | 8.9% | 13.3% | 15.7% |
| $75,000 to $99,999 | 8.4% | 11.8% | 12.7% |
| $100,000 to $149,999 | 15.4% | 17.9% | 17.4% |
| $150,000 to $199,999 | 12.5% | 11.1% | 9.3% |
| $200,000 or more | 39.0% | 19.4% | 12.6% |
6.0% of adults in San Mateo County completed < 9th grade.
4.0% of adults in San Mateo County completed 9-12th grade.
15.0% of adults in San Mateo County completed high school / ged.
15.0% of adults in San Mateo County completed some college.
7.0% of adults in San Mateo County completed associate's degree.
29.0% of adults in San Mateo County completed bachelor's degree.
15.0% of adults in San Mateo County completed master's degree.
4.0% of adults in San Mateo County completed professional degree.
5.0% of adults in San Mateo County completed doctorate degree.
| Education | San Mateo County | CA | USA |
|---|---|---|---|
| < 9th Grade | 6% | 7% | 5% |
| 9-12th Grade | 4% | 7% | 6% |
| High School / GED | 15% | 20% | 26% |
| Some College | 15% | 20% | 19% |
| Associate's Degree | 7% | 8% | 9% |
| Bachelor's Degree | 28% | 22% | 21% |
| Master's Degree | 15% | 10% | 10% |
| Professional Degree | 4% | 3% | 2% |
| Doctorate Degree | 5% | 2% | 2% |
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