South Monrovia Island, CA Profile: Facts & Data

The South Monrovia Island CDP⁽¹⁾ had a population of 6,109 as of July 1, 2024. South Monrovia Island ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in California. See peer rankings below.

The South Monrovia Island Census Designated Place has a U2 Census Class Code which indicates a census designated place without an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

California is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The South Monrovia Island Census Designated Place is located within Upper San Gabriel Valley CCD of Los Angeles County.

A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

South Monrovia Island, CA Data & Demographics (As of July 1, 2024)

POPULATION
Total Population	6,109 (100%)
Population in Households	5,947 (97.3%)
Population in Families	5,248 (85.9%)
Population in Group Quarters¹	162 ( 2.7%)
Population Density	11,146
Diversity Index²	84


INCOME
Median Household Income	$102,360
Average Household Income	$115,761
% of Income for Mortgage⁴	42%
Per Capita Income	$30,677
Wealth Index⁵	95
Socioeconomic Status Index⁶	Low (38.6)

HOUSING
Total HU (Housing Units)	1,660 (100%)
Owner Occupied HU	1,110 (66.9%)
Renter Occupied HU	506 (30.5%)
Vacant Housing Units	44 ( 2.7%)
Median Home Value	$683,202
Average Home Value	$819,932
Housing Affordability Index³	61

HOUSEHOLDS
Total Households	1,616
Average Household Size	3.68
Family Households	1,336
Average Family Size	4.00

NOTES

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.
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.
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.
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).
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.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

South Monrovia Island, CA - Peer Comparisons by Rank and Percentile

The table below compares South Monrovia Island to the other 1,618 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2024 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.

GROWTH RATE / YEAR	2020-2024	2024-2029
Population	-1.50%	-0.58%
Households	-0.27%	-0.04%
Families		-0.03%
Median Household Income		2.73%
Per Capita Income		4.16%
Owner Occupied HU		0.23%

Variable Description	Rank	Percentile
Total Population	# 602	63rd
Population Density	# 44	97th
Median Household Income	# 548	66th
Housing Affordability Index	# 1030	64th
Per Capita Income	# 1168	28th
Diversity Index	# 184	89th

South Monrovia Island, CA Profile: Facts & Data

South Monrovia Island, California - Basic Facts

South Monrovia Island, CA Data & Demographics (As of July 1, 2024)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

South Monrovia Island, CA - Peer Comparisons by Rank and Percentile

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