2020 census As of the
2020 census, Imperial had a population of 20,263 and a population density of . The age distribution was 30.6% under the age of 18, 8.9% aged 18 to 24, 29.8% aged 25 to 44, 21.7% aged 45 to 64, and 9.0% who were 65 years of age or older. The median age was 32.7 years. For every 100 females there were 94.4 males, and for every 100 females age 18 and over there were 89.8 males age 18 and over. The census reported that 99.8% of the population lived in households and 32 people (0.2%) were institutionalized. There were 6,029 households, of which 53.5% had children under the age of 18 living in them. Of all households, 58.8% were married-couple households, 6.1% were
cohabiting-couple households, 12.2% were households with a male householder and no spouse or partner present, and 22.9% were households with a female householder and no spouse or partner present. About 14.3% of all households were made up of individuals and 4.9% had someone living alone who was 65 years of age or older. The average household size was 3.36. There were 4,958 families (82.2% of all households). The median household income in 2023 was $83,214, and the
per capita income was $28,599. About 10.7% of families and 12.4% of the population were below the poverty line.
2010 census The
2010 United States census reported that Imperial had a population of 14,758. The population density was . The racial makeup of Imperial was 9,298 (63.0%)
White, 331 (2.2%)
African American, 154 (1.0%)
Native American, 370 (2.5%)
Asian, 13 (0.1%)
Pacific Islander, 3,783 (25.6%) from
other races, and 809 (5.5%) from two or more races. The ethnic makeup of Imperial was 11,046 (74.8%)
Hispanic or
Latino of any race. The Census reported that 14,727 people (99.8% of the population) lived in households, 0 (0%) lived in non-institutionalized group quarters, and 31 (0.2%) were institutionalized. There were 4,405 households, out of which 2,464 (55.9%) had children under the age of 18 living in them, 2,669 (60.6%) were
opposite-sex married couples living together, 697 (15.8%) had a female householder with no husband present, 255 (5.8%) had a male householder with no wife present. There were 268 (6.1%)
unmarried opposite-sex partnerships, and 27 (0.6%)
same-sex married couples or partnerships. 621 households (14.1%) were made up of individuals, and 181 (4.1%) had someone living alone who was 65 years of age or older. The average household size was 3.34. There were 3,621
families (82.2% of all households); the average family size was 3.69. The population was spread out, with 4,927 people (33.4%) under the age of 18, 1,376 people (9.3%) aged 18 to 24, 4,618 people (31.3%) aged 25 to 44, 2,881 people (19.5%) aged 45 to 64, and 956 people (6.5%) who were 65 years of age or older. The median age was 29.9 years. For every 100 females, there were 95.6 males. For every 100 females age 18 and over, there were 92.3 males. There were 4,751 housing units at an average density of , of which 4,405 were occupied, of which 3,130 (71.1%) were owner-occupied, and 1,275 (28.9%) were occupied by renters. The homeowner vacancy rate was 4.5%; the rental vacancy rate was 4.5%. 10,692 people (72.4% of the population) lived in owner-occupied housing units and 4,035 people (27.3%) lived in rental housing units. ==Arts and culture==