Rancho Santa Margarita, CA Profile: Facts & Data


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Rancho Santa Margarita, California - Basic Facts

The City of Rancho Santa Margarita had a population of 48,579 as of July 1, 2020. Rancho Santa Margarita 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 Rancho Santa Margarita is located at latitude 33.6409 and longitude -117.6031 in Orange County. The formal boundaries for the City of Rancho Santa Margarita encompass a land area of 12.9 sq. miles and a water area of 0.04 sq. miles. Orange County is in the Pacific time zone (GMT -8). The elevation is 932 feet.

The City of Rancho Santa Margarita (GNIS ID: 2411517) 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 Rancho Santa Margarita is located within Mission Viejo CCD of Orange County.


Rancho Santa Margarita, CA Data & Demographics (As of July 1, 2020)


Total Population 48,579 (100%)
Population in Households 48,577 (100.0%)
Population in Families 42,539 (87.6%)
Population in Group Quarters1 2 ( 0.0%)
Population Density 3,767
Diversity Index2 63


Median Household Income $118,162
Average Household Income $146,926
% of Income for Mortgage4 24%
Per Capita Income $50,324
Wealth Index5 187


Total HU (Housing Units) 17,349 (100%)
Owner Occupied HU 11,643 (67.1%)
Renter Occupied HU 5,038 (29.0%)
Vacant Housing Units 668 ( 3.9%)
Median Home Value $671,944
Average Home Value $703,516
Housing Affordability Index3 102


Total Households 16,681
Average Household Size 2.91
Family Households 12,651
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 0.23% 0.23%
Households 0.09% 0.12%
Families 0.17% 0.13%
Median Household Income   1.29%
Per Capita Income   1.9%
Owner Occupied HU   0.2%


Rancho Santa Margarita, CA - Peer Comparisons by Rank and Percentile

The table below compares Rancho Santa Margarita 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 # 197 87th
Population Density # 343 78th
Median Household Income # 154 90th
Housing Affordability Index # 886 58th
Per Capita Income # 294 81st
Diversity Index # 796 48th

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

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