San Carlos, CA Profile: Facts, Map & Data


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San Carlos, California - Basic Facts

The City of San Carlos had a population of 29,837 as of July 1, 2017. San Carlos ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in California. See peer rankings below.

The primary coordinate point for San Carlos is located at latitude 37.4955 and longitude -122.2668 in San Mateo County. The formal boundaries for the City of San Carlos (see map below) encompass a land area of 5.53 sq. miles and a water area of 0 sq. miles. San Mateo County is in the Pacific time zone (GMT -8). The elevation is 30 feet.

The City of San Carlos (GNIS ID: 2411780) 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 City of San Carlos is located within San Mateo CCD of San Mateo County.

Beneath the boundary map are tables with San Carlos population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Neighborhood Data

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City of San Carlos, CA Boundary Map

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San Carlos, CA Data & Demographics (As of July 1, 2017)


Total Population 29,837
Daytime Population: Workers 20,251
Daytime Population: Residents 14,098
Total Daytime Population (TDP) 34,349
Ratio TDP/Total Population1 1.15
Population in Households 29,639
Population in Familes 24,451
Population in Group Qrtrs 198
Population Density2 5,399
Diversity Index3 52


Median Household Income $129,329
Average Household Income $183,719
Per Capita Income $73,954


Total Housing Units 12,423 (100%)
Owner Occupied HU 8,513 (68.5%)
Renter Occupied HU 3,494 (28.1%)
Vacant Housing Units 416 ( 3.3%)
Median Home Value $1,000,001
Average Home Value $1,039,405


Total Households 12,007
Average Household Size 2.47
Family Households 8,141
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. 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 race 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.


2010-2017 2017-2022
Population 0.68% 0.69%
Households 0.57% 0.63%
Families 0.54% 0.64%
Median Household Income   1.84%
Per Capita Income   1.92%

San Carlos, CA - Peer Comparisons by Rank and Percentile

The table below compares San Carlos to the other 1,516 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2017 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 # 269 82nd
Population Density # 216 86th
Diversity Index # 960 37th
Median Household Income # 69 96th
Per Capita Income # 64 96th

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

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