2020 census As of the
2020 census, Moss Beach had a population of 3,214 and a population density of . The median age was 44.6 years. The age distribution was 19.1% under the age of 18, 8.1% aged 18 to 24, 23.4% aged 25 to 44, 29.2% aged 45 to 64, and 20.1% who were 65 years of age or older. For every 100 females, there were 100.4 males, and for every 100 females age 18 and over, there were 101.9 males age 18 and over. The census reported that 96.4% of the population lived in households, 0.5% lived in non-institutionalized group quarters, and 3.2% were institutionalized. 97.2% of residents lived in urban areas, while 2.8% lived in rural areas. There were 1,067 households, out of which 29.7% included children under the age of 18. Of all households, 58.4% were married-couple households, 7.1% were
cohabiting couple households, 21.3% had a female householder with no spouse or partner present, and 13.2% had a male householder with no spouse or partner present. 18.5% of households were one person, and 12.0% were one person aged 65 or older. The average household size was 2.9. There were 777
families (72.8% of all households). There were 1,155 housing units at an average density of , of which 1,067 (92.4%) were occupied. Of occupied units, 85.1% were owner-occupied and 14.9% were occupied by renters. 7.6% of housing units were vacant. The homeowner vacancy rate was 0.8% and the rental vacancy rate was 8.9%.
2010 census The
2010 United States census reported that Moss Beach had a population of 3,103. The population density was . The racial make-up of Moss Beach was 2,280 (73.5%)
White, 25 (0.8%)
African American, 43 (1.4%)
Native American, 118 (3.8%)
Asian, 9 (0.3%)
Pacific Islander, 494 (15.9%) from
other races, and 134 (4.3%) from two or more races.
Hispanic or
Latino of any race were 903 persons (29.1%). The census reported that 2,983 people (96.1% of the population) lived in households, 12 (0.4%) lived in non-institutionalized group quarters, and 108 (3.5%) were institutionalized. There were 1,062 households, of which 359 (33.8%) had children under the age of 18 living in them, 607 (57.2%) were
opposite-sex married couples living together, 85 (8.0%) had a female householder with no husband present, 41 (3.9%) had a male householder with no wife present. There were 49 (4.6%)
unmarried opposite-sex partnerships, and 14 (1.3%)
same-sex married couples or partnerships. 251 households (23.6%) were made up of individuals, and 68 (6.4%) had someone living alone who was 65 years of age or older. The average household size was 2.81. There were 733
families (69.0% of all households); the average family size was 3.35. 710 people (22.9%) were under the age of 18, 234 people (7.5%) aged 18 to 24, 699 people (22.5%) aged 25 to 44, 1,097 people (35.4%) aged 45 to 64, and 363 people (11.7%) were 65 years of age or older. The median age was 43.2 years. For every 100 females, there were 99.9 males. For every 100 females age 18 and over, there were 97.6 males. There were 1,154 housing units at an average density of , of which 868 (81.7%) were owner-occupied, and 194 (18.3%) were occupied by renters. The homeowner vacancy rate was 1.2%; the rental vacancy rate was 6.3%. 2,448 people (78.9% of the population) lived in owner-occupied housing units and 535 people (17.2%) lived in rental housing units. ==Climate==