Official population figures include inmates of two prisons. Chowchilla is part of the
Madera metropolitan statistical area.
2020 census As of the
2020 census, Chowchilla had a population of 19,039 and a population density of . The census reported that 69.7% of the population lived in households and 30.3% were institutionalized. Among all residents, 69.3% lived in urban areas and 30.7% lived in rural areas. There were 4,252 households, of which 46.2% had children under the age of 18 living in them. Of all households, 48.6% were married-couple households, 7.9% were
cohabiting couple households, 27.7% had a female householder with no partner present, and 15.7% had a male householder with no partner present. About 18.1% of households were one person households, and 8.4% were one-person households with someone aged 65 or older. The average household size was 3.12, and there were 3,241
families (76.2% of all households).
2023 ACS 5-year estimates In 2023, the US Census Bureau estimated that the median household income was $63,308, and the
per capita income was $21,944. About 17.6% of families and 22.2% of the population were below the poverty line.
2010 census At the
2010 census Chowchilla had a population of 18,720, including the prisons' inmates. The population density was . The racial makeup of Chowchilla was 11,533 (61.6%) White, 2,358 (12.6%) African American, 376 (2.0%) Native American, 395 (2.1%) Asian, 37 (0.2%) Pacific Islander, 3,313 (17.7%) from
other races, and 708 (3.8%) from two or more races. Hispanic or Latino of any race were 7,073 persons (37.8%). The census reported that 11,311 people (60.4% of the population) lived in households, 6 (0%) lived in non-institutionalized group quarters, and 7,403 (39.5%) were institutionalized. There were 3,673 households, 1,693 (46.1%) had children under the age of 18 living in them, 1,932 (52.6%) were
opposite-sex married couples living together, 586 (16.0%) had a female householder with no husband present, 260 (7.1%) had a male householder with no wife present. There were 275 (7.5%)
unmarried opposite-sex partnerships, and 24 (0.7%)
same-sex married couples or partnerships. 721 households (19.6%) were one person and 293 (8.0%) had someone living alone who was 65 or older. The average household size was 3.08. There were 2,778 families (75.6% of households); the average family size was 3.52. The age distribution was 3,583 people (19.1%) under the age of 18, 2,048 people (10.9%) aged 18 to 24, 7,343 people (39.2%) aged 25 to 44, 4,429 people (23.7%) aged 45 to 64, and 1,317 people (7.0%) who were 65 or older. The median age was 34.7 years. For every 100 females, there were 42.7 males. For every 100 females age 18 and over, there were 33.3 males. There were 4,154 housing units at an average density of 542.2 per square mile, of the occupied units 1,966 (53.5%) were owner-occupied and 1,707 (46.5%) were rented. The homeowner vacancy rate was 6.2%; the rental vacancy rate was 7.9%. 5,920 people (31.6% of the population) lived in owner-occupied housing units and 5,391 people (28.8%) lived in rental housing units. ==Economy==