Demographics
Los Osos formerly was combined with the adjoining unincorporated area of Baywood Park to form the census-designated place of Baywood-Los Osos, but they were split into separate CDPs for the 2010 census. The 2010 United States Census reported that Los Osos had a population of 14,276. The population density was 1,116.7 people per square mile (431.2/km²). The racial makeup of Los Osos was 12,304 (86.2%) White, 79 (0.6%) African American, 97 (0.7%) Native American, 748 (5.2%) Asian, 18 (0.1%) Pacific Islander, 552 (3.9%) from other races, and 478 (3.3%) from two or more races. Hispanic or Latino of any race were 1,977 persons (13.8%).
The Census reported that 14,191 people (99.4% of the population) lived in households, 74 (0.5%) lived in non-institutionalized group quarters, and 11 (0.1%) were institutionalized.
There were 5,958 households, out of which 1,537 (25.8%) had children under the age of 18 living in them, 3,039 (51.0%) were opposite-sex married couples living together, 545 (9.1%) had a female householder with no husband present, 252 (4.2%) had a male householder with no wife present. There were 315 (5.3%) unmarried opposite-sex partnerships, and 67 (1.1%) same-sex married couples or partnerships. 1,595 households (26.8%) were made up of individuals and 717 (12.0%) had someone living alone who was 65 years of age or older. The average household size was 2.38. There were 3,836 families (64.4% of all households); the average family size was 2.86.
The population was spread out with 2,557 people (17.9%) under the age of 18, 1,162 people (8.1%) aged 18 to 24, 3,056 people (21.4%) aged 25 to 44, 4,827 people (33.8%) aged 45 to 64, and 2,674 people (18.7%) who were 65 years of age or older. The median age was 47.2 years. For every 100 females there were 95.5 males. For every 100 females age 18 and over, there were 92.6 males.
There were 6,488 housing units at an average density of 507.5 per square mile (196.0/km²), of which 4,034 (67.7%) were owner-occupied, and 1,924 (32.3%) were occupied by renters. The homeowner vacancy rate was 1.3%; the rental vacancy rate was 4.7%. 9,345 people (65.5% of the population) lived in owner-occupied housing units and 4,846 people (33.9%) lived in rental housing units.
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