Hillsborough

County:: San Mateo County
County Seat:: No
Area (mi²):: 6.166
State:: California

Hillsborough is a town located in San Mateo County, California. Hillsborough has a 2025 population of 10,563. Hillsborough is currently declining at a rate of -1.49% annually and its population has decreased by -7.04% since the most recent census, which recorded a population of 11,363 in 2020.

The average household income in Hillsborough is $523,236 with a poverty rate of 3.81%.The median age in Hillsborough is 46.8 years: 44.9 years for males, and 47.7 years for females.

Demographics

The racial composition of Hillsborough includes 54.37% White, 32.87% Asian, and smaller percentages for other race, Black or African American, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	6,047	54.37%
Asian	3,656	32.87%
Two or more races	1,172	10.54%
Other race	178	1.6%
Black or African American	44	0.4%
Native Hawaiian or Pacific Islander	18	0.16%
Native American	7	0.06%

Hillsborough Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Hillsborough's average per capita income is $150,750. Household income levels show a median of $250,001. The poverty rate stands at 3.81%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Households	$250,001	$523,236
Families	$250,001	$561,062
Married Families	$250,001	-
Non Families	-	$284,409

$150,750

Average Income

$250,001

Median Household Income

3.81%

Poverty Rate