Racial and ethnic composition 2020 census As of the
2020 census, Calimesa had a population of 10,026. The population density was . The median age was 45.9 years. 20.0% of residents were under the age of 18 and 24.9% of residents were 65 years of age or older. For every 100 females there were 95.1 males, and for every 100 females age 18 and over there were 91.7 males age 18 and over. The census reported that 99.6% of the population lived in households, 0.3% lived in non-institutionalized group quarters, and 0.1% were institutionalized. 89.8% of residents lived in urban areas, while 10.2% lived in rural areas. There were 3,922 households in Calimesa, of which 27.6% had children under the age of 18 living in them. Of all households, 51.9% were married-couple households, 5.4% were
cohabiting couple households, 16.1% were households with a male householder and no spouse or partner present, and 26.6% were households with a female householder and no spouse or partner present. About 24.9% of all households were made up of individuals and 15.7% had someone living alone who was 65 years of age or older. The average household size was 2.55, and there were 2,699
families (68.8% of all households).
2010 census At the
2010 census Calimesa had a population of 7,879. The population density was . The racial makeup of Calimesa was 6,777 (86.0%) White (72.7% Non-Hispanic White), 88 (1.1%) African American, 99 (1.3%) Native American, 100 (1.3%) Asian, 10 (0.1%) Pacific Islander, 565 (7.2%) from
other races, and 240 (3.0%) from two or more races. Hispanic or Latino of any race were 1,762 persons (22.4%). The census reported that 7,828 people (99.4% of the population) lived in households, 42 (0.5%) lived in non-institutionalized group quarters, and 9 (0.1%) were institutionalized. There were 3,314 households, 773 (23.3%) had children under the age of 18 living in them, 1,609 (48.6%) were
opposite-sex married couples living together, 334 (10.1%) had a female householder with no husband present, 157 (4.7%) had a male householder with no wife present. There were 162 (4.9%)
unmarried opposite-sex partnerships, and 22 (0.7%)
same-sex married couples or partnerships. 1,024 households (30.9%) were one person and 609 (18.4%) had someone living alone who was 65 or older. The average household size was 2.36. There were 2,100 families (63.4% of households); the average family size was 2.94. The age distribution was 1,414 people (17.9%) under the age of 18, 602 people (7.6%) aged 18 to 24, 1,513 people (19.2%) aged 25 to 44, 2,310 people (29.3%) aged 45 to 64, and 2,040 people (25.9%) who were 65 or older. The median age was 48.8 years. For every 100 females, there were 92.4 males. For every 100 females age 18 and over, there were 89.8 males. There were 3,687 housing units at an average density of 248.3 per square mile, of the occupied units 2,674 (80.7%) were owner-occupied and 640 (19.3%) were rented. The homeowner vacancy rate was 5.9%; the rental vacancy rate was 10.3%. 6,059 people (76.9% of the population) lived in owner-occupied housing units and 1,769 people (22.5%) lived in rental housing units. According to the 2010 United States Census, Calimesa had a median household income of $44,817, with 14.5% of the population living below the federal poverty line. ==Government==