San Francisco, CA Profile: Facts & Data


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San Francisco, California - Basic Facts

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The City of San Francisco is the 4th largest city in California with a population of 873,035 as of July 1, 2021. San Francisco 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 Francisco is located at latitude 37.775 and longitude -122.4194 in San Francisco County. The formal boundaries for the City of San Francisco encompass a land area of 46.89 sq. miles and a water area of 185 sq. miles. San Francisco County is in the Pacific time zone (GMT -8). The elevation is 52 feet.

The City of San Francisco 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 Francisco is located within San Francisco CCD of San Francisco County.

Alternate Unofficial Names for San Francisco: Frisco, New Albion, Yerba Buena.

Jump to... (On This Page!)
  1. San Francisco 2021 Demographic Data
  2. Growth Rates for San Francisco (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. California Research Tools (Easy Tools & Current Data)
  3. California Data Comparison Tool - 2021 Demographics

San Francisco, CA Data & Demographics (As of July 1, 2021)


Total Population 873,035 (100%)
Population in Households 848,800 (97.2%)
Population in Families 510,497 (58.5%)
Population in Group Quarters1 24,235 ( 2.8%)
Population Density 18,614
Diversity Index2 75


Median Household Income $120,910
Average Household Income $173,645
% of Income for Mortgage4 43%
Per Capita Income $74,500
Wealth Index5 153


Total HU (Housing Units) 407,815 (100%)
Owner Occupied HU 139,024 (34.1%)
Renter Occupied HU 235,014 (57.6%)
Vacant Housing Units 33,777 ( 8.3%)
Median Home Value $1,240,544
Average Home Value $1,336,584
Housing Affordability Index3 57


Total Households 374,038
Average Household Size 2.27
Family Households 162,656
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.


2010-2021 2021-2026
Population 0.72% 0.79%
Households 0.7% 0.78%
Families 0.66% 0.77%
Median Household Income   3.51%
Per Capita Income   2.53%
Owner Occupied HU   0.62%

San Francisco, CA - Peer Comparisons by Rank and Percentile

The table below compares San Francisco to the other 1,521 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2021 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 # 4 100th
Population Density # 7 100th
Median Household Income # 142 91st
Housing Affordability Index # 327 21st
Per Capita Income # 99 94th
Diversity Index # 543 64th

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

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