2020 census As of the
2020 census, Morro Bay had a population of 10,757 and a population density of . The age distribution was 13.2% under the age of 18, 5.6% aged 18 to 24, 20.4% aged 25 to 44, 28.0% aged 45 to 64, and 32.8% who were 65 years of age or older. The median age was 54.6 years. For every 100 females, there were 91.8 males, and for every 100 females age 18 and over, there were 90.8 males age 18 and over. The census reported that 96.7% of the population lived in households, 1.9% lived in non-institutionalized group quarters, and 1.3% were institutionalized. 98.6% of residents lived in urban areas, while 1.4% lived in rural areas. There were 5,038 households, of which 17.7% had children under the age of 18 living in them. Of all households, 42.6% were married-couple households, 7.0% were
cohabiting couple households, 30.2% had a female householder with no spouse or partner present, and 20.1% had a male householder with no spouse or partner present. About 35.3% of households were made up of individuals, and 20.2% had someone living alone who was 65 years of age or older. The average household size was 2.07. There were 2,848
families (56.5% of all households). The median household income in 2023 was $92,553, and the
per capita income was $59,411. About 5.7% of families and 9.9% of the population were below the poverty line.
2010 census The
2010 United States census reported that Morro Bay had a population of 10,234. The population density was . The
racial makeup of Morro Bay was 87.1% White, 0.4% African American, 0.9% Native American, 2.5% Asian, 0.1% Pacific Islander, 6.0% from
other races, and 3.0% from two or more races. About 14.9% of the residents were Hispanics or Latinos of any race. The census reported that 98.4% of the population lived in households, 0.4% lived in noninstitutionalized group quarters, and 1.2% were institutionalized. Of the 4,844 households, 19.0% had children under 18 living in them, 40.7% were opposite-sex married couples living together, 8.4% had a female householder with no husband present, and 4.5% had a male householder with no wife present; 6.8% were
unmarried opposite-sex partnerships, and 0.7% were
same-sex married couples or partnerships. Of the 1,808 households, 37.3% were made up of individuals and 16.2% had someone living alone who was 65 or older. The average household size was 2.08. About 53.6% of all households were families; the average family size was 2.70. The city's age distribution was 15.0% under 18, 8.0% from 18 to 24, 22.1% from 25 to 44, 31.3% from 45 to 64, and 23.7% who were 65 or older. The median age was 48.9 years. For every 100 females, there were 95.8 males. For every 100 females 18 and over, there were 93.6 males. The 6,320 housing units had an average density of , of which 53.3% were owner-occupied and 46.7% were occupied by renters. The homeowner vacancy rate was 3.3%; the rental vacancy rate was 6.3%. About 51.0% of the population lived in owner-occupied housing units and 47.4% lived in rental housing units. Morro Bay High School, Los Osos Middle School, and Del Mar Elementary offer education for grades 9-12, grades 6-8, and kindergarten through grade 5, respectively. ==Economy==