Shell Ridge, California

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Shell Ridge
Census-designated place
Shell Ridge is located in California
Shell Ridge
Shell Ridge
Position in California.
Coordinates: 37°54′21″N 122°02′04″W / 37.90583°N 122.03444°W / 37.90583; -122.03444Coordinates: 37°54′21″N 122°02′04″W / 37.90583°N 122.03444°W / 37.90583; -122.03444
Country  United States
State  California
County Contra Costa
 • Total 0.430 sq mi (1.114 km2)
 • Land 0.430 sq mi (1.114 km2)
 • Water 0 sq mi (0 km2)  0%
Elevation2 299 ft (91 m)
Population (2010)
 • Total 959
 • Density 2,200/sq mi (860/km2)
Time zone Pacific (PST) (UTC-8)
 • Summer (DST) PDT (UTC-7)
GNIS feature ID 2583136
U.S. Geological Survey Geographic Names Information System: Shell Ridge, California

Shell Ridge is a census-designated place3 in Contra Costa County, California. Shell Ridge sits at an elevation of 295 feet (90 m). The 2010 United States census reported Shell Ridge's population was 959.


According to the United States Census Bureau, the CDP has a total area of 0.430 square miles (1.11 km2), all of it land.


The 2010 United States Census4 reported that Shell Ridge had a population of 959. The population density was 2,230.6 people per square mile (861.2/km²). The racial makeup of Shell Ridge was 821 (85.6%) White, 5 (0.5%) African American, 2 (0.2%) Native American, 73 (7.6%) Asian, 6 (0.6%) Pacific Islander, 8 (0.8%) from other races, and 44 (4.6%) from two or more races. Hispanic or Latino of any race were 59 persons (6.2%).

The Census reported that 100% of the population lived in households.

There were 357 households, out of which 128 (35.9%) had children under the age of 18 living in them, 263 (73.7%) were opposite-sex married couples living together, 20 (5.6%) had a female householder with no husband present, 13 (3.6%) had a male householder with no wife present. There were 7 (2.0%) unmarried opposite-sex partnerships, and 4 (1.1%) same-sex married couples or partnerships. 52 households (14.6%) were made up of individuals and 32 (9.0%) had someone living alone who was 65 years of age or older. The average household size was 2.69. There were 296 families (82.9% of all households); the average family size was 2.96.

The population was spread out with 229 people (23.9%) under the age of 18, 46 people (4.8%) aged 18 to 24, 157 people (16.4%) aged 25 to 44, 353 people (36.8%) aged 45 to 64, and 174 people (18.1%) who were 65 years of age or older. The median age was 48.3 years. For every 100 females there were 106.2 males. For every 100 females age 18 and over, there were 100.0 males.

There were 370 housing units at an average density of 860.6 per square mile (332.3/km²), of which 334 (93.6%) were owner-occupied, and 23 (6.4%) were occupied by renters. The homeowner vacancy rate was 0%; the rental vacancy rate was 11.1%. 887 people (92.5% of the population) lived in owner-occupied housing units and 72 people (7.5%) lived in rental housing units.


  1. ^ U.S. Census
  2. ^ U.S. Geological Survey Geographic Names Information System: Shell Ridge, California
  3. ^ U.S. Geological Survey Geographic Names Information System: Shell Ridge, California
  4. ^ 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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