Hillsborough, CA Profile: Facts & Data


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Hillsborough, California - Basic Facts

The Town of Hillsborough had a population of 10,756 as of July 1, 2020.

The primary coordinate point for Hillsborough is located at latitude 37.5741 and longitude -122.3794 in San Mateo County. The formal boundaries for the Town of Hillsborough encompass a land area of 6.19 sq. miles and a water area of 0 sq. miles. San Mateo County is in the Pacific time zone (GMT -8). The elevation is 322 feet.

The Town of Hillsborough (GNIS ID: 2412752) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

California is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The Town of Hillsborough is located within San Mateo CCD of San Mateo County.


Hillsborough, CA Data & Demographics (As of July 1, 2020)


Total Population 10,756 (100%)
Population in Households 10,756 (100.0%)
Population in Families 9,916 (92.2%)
Population in Group Quarters1 0
Population Density 1,738
Diversity Index2 56


Median Household Income $200,001
Average Household Income $345,965
% of Income for Mortgage4 42%
Per Capita Income $117,615
Wealth Index5 569


Total HU (Housing Units) 3,918 (100%)
Owner Occupied HU 3,466 (88.5%)
Renter Occupied HU 191 ( 4.9%)
Vacant Housing Units 261 ( 6.7%)
Median Home Value $2,000,001
Average Home Value $2,217,232
Housing Affordability Index3 62


Total Households 3,657
Average Household Size 2.94
Family Households 3,110
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2020 2020-2025
Population -0.06% -0.05%
Households -0.1% -0.09%
Families -0.09% -0.08%
Median Household Income   0.0%
Per Capita Income   1.1%
Owner Occupied HU   -0.04%


Hillsborough, CA - Peer Comparisons by Rank and Percentile

The table below compares Hillsborough to the other 1,521 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2020 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 479 69th
Population Density # 641 58th
Median Household Income # 23 100th
Housing Affordability Index # 309 20th
Per Capita Income # 8 100th
Diversity Index # 918 40th

Additional comparisons and rankings can be made with a VERY EASY TO USE California Census Data Comparison Tool.

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