South Monrovia Island, California

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South Monrovia Island
census-designated place
South Monrovia Island is located in California
South Monrovia Island
South Monrovia Island
Position in California.
Coordinates: 34°07′05″N 117°59′45″W / 34.11806°N 117.99583°W / 34.11806; -117.99583Coordinates: 34°07′05″N 117°59′45″W / 34.11806°N 117.99583°W / 34.11806; -117.99583
Country  United States
State  California
County Los Angeles
 • Total 0.548 sq mi (1.419 km2)
 • Land 0.548 sq mi (1.419 km2)
 • Water 0 sq mi (0 km2)  0%
Elevation[2] 384 ft (117 m)
Population (2010)
 • Total 6,777
 • Density 12,000/sq mi (4,800/km2)
Time zone Pacific (PST) (UTC-8)
 • Summer (DST) PDT (UTC-7)
GNIS feature ID 2629294
U.S. Geological Survey Geographic Names Information System: South Monrovia Island, California

South Monrovia Island is a census-designated place in Los Angeles County, California. South Monrovia Island sits at an elevation of 384 feet (117 m). The 2010 United States census reported South Monrovia Island's population was 6,777.


According to the United States Census Bureau, the CDP has a total area of 0.5 square miles (1.4 km²), all of which is land.


The 2010 United States Census[3] reported that South Monrovia Island had a population of 6,777. The population density was 12,372.2 people per square mile (4,776.9/km²). The racial makeup of South Monrovia Island was 3,433 (50.7%) White (10.9% Non-Hispanic White),[4] 570 (8.4%) African American, 49 (0.7%) Native American, 418 (6.2%) Asian, 9 (0.1%) Pacific Islander, 2,003 (29.6%) from other races, and 295 (4.4%) from two or more races. Hispanic or Latino of any race were 5,013 persons (74.0%).

The Census reported that 6,620 people (97.7% of the population) lived in households, 9 (0.1%) lived in non-institutionalized group quarters, and 148 (2.2%) were institutionalized.

There were 1,551 households, out of which 857 (55.3%) had children under the age of 18 living in them, 907 (58.5%) were opposite-sex married couples living together, 271 (17.5%) had a female householder with no husband present, 142 (9.2%) had a male householder with no wife present. There were 92 (5.9%) unmarried opposite-sex partnerships, and 7 (0.5%) same-sex married couples or partnerships. 179 households (11.5%) were made up of individuals and 84 (5.4%) had someone living alone who was 65 years of age or older. The average household size was 4.27. There were 1,320 families (85.1% of all households); the average family size was 4.39.

The population was spread out with 1,937 people (28.6%) under the age of 18, 772 people (11.4%) aged 18 to 24, 1,945 people (28.7%) aged 25 to 44, 1,574 people (23.2%) aged 45 to 64, and 549 people (8.1%) who were 65 years of age or older. The median age was 32.0 years. For every 100 females there were 99.2 males. For every 100 females age 18 and over, there were 99.5 males.

There were 1,613 housing units at an average density of 2,944.7 per square mile (1,137.0/km²), of which 1,151 (74.2%) were owner-occupied, and 400 (25.8%) were occupied by renters. The homeowner vacancy rate was 2.1%; the rental vacancy rate was 2.2%. 4,835 people (71.3% of the population) lived in owner-occupied housing units and 1,785 people (26.3%) lived in rental housing units.

According to the 2010 United States Census, South Monrovia Island had a median household income of $52,936, with 16.1% of the population living below the federal poverty line. [5]


  1. ^ U.S. Census
  2. ^ U.S. Geological Survey Geographic Names Information System: South Monrovia Island, California
  3. ^ All data are derived from the United States Census Bureau reports from the 2010 United States Census, and are accessible on-line here. The data on unmarried partnerships and same-sex married couples are from the Census report DEC_10_SF1_PCT15. All other housing and population data are from Census report DEC_10_DP_DPDP1. Both reports are viewable online or downloadable in a zip file containing a comma-delimited data file. The area data, from which densities are calculated, are available on-line here. Percentage totals may not add to 100% due to rounding. The Census Bureau defines families as a household containing one or more people related to the householder by birth, opposite-sex marriage, or adoption. People living in group quarters are tabulated by the Census Bureau as neither owners nor renters. For further details, see the text files accompanying the data files containing the Census reports mentioned above.
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