2020 census As of the
2020 census, Gridley had a population of 7,421. The population density was . The median age was 36.1 years. 26.7% of residents were under the age of 18 and 15.8% were 65 years of age or older. For every 100 females, there were 96.2 males, and for every 100 females age 18 and over, there were 91.6 males. The census reported that 97.3% of the population lived in households, 0.7% lived in non-institutionalized group quarters, and 2.0% were institutionalized. There were 2,446 households, of which 40.9% had children under the age of 18 living in them. Of all households, 48.2% were married-couple households, 16.6% were households with a male householder and no spouse or partner present, and 27.4% were households with a female householder and no spouse or partner present. About 22.4% of all households were made up of individuals, and 10.5% had someone living alone who was 65 years of age or older. The average household size was 2.95. There were 1,729 families (70.7% of all households).
Demographic estimates In 2023, the US Census Bureau estimated that 16.3% of the population were foreign-born. Of all people aged 5 or older, 72.3% spoke only English at home, 26.8% spoke
Spanish, 0.4% spoke other
Indo-European languages, 0.3% spoke Asian or Pacific Islander languages, and 0.2% spoke other languages. Of those aged 25 or older, 82.1% were high school graduates and 14.9% had a bachelor's degree.
Income and poverty The median household income in 2023 was $57,860, and the
per capita income was $28,242. About 10.5% of families and 11.6% of the population were below the poverty line.
2010 census The
2010 United States census reported that Gridley had a population of 6,584. The population density was . The racial makeup of Gridley was 4,283 (65.1%)
White, 55 (0.8%)
African American, 98 (1.5%)
Native American, 249 (3.8%)
Asian, 3 (0.0%)
Pacific Islander, 1,552 (23.6%) from
other races, and 344 (5.2%) from two or more races.
Hispanic or
Latino of any race were 3,000 persons (45.6%). The Census reported that 6,472 people (98.3% of the population) lived in households, 16 (0.2%) lived in non-institutionalized group quarters, and 96 (1.5%) were institutionalized. There were 2,183 households, out of which 910 (41.7%) had children under the age of 18 living in them, 1,087 (49.8%) were
opposite-sex married couples living together, 338 (15.5%) had a female householder with no husband present, 134 (6.1%) had a male householder with no wife present. There were 149 (6.8%)
unmarried opposite-sex partnerships, and 8 (0.4%)
same-sex married couples or partnerships. 520 households (23.8%) were made up of individuals, and 297 (13.6%) had someone living alone who was 65 years of age or older. The average household size was 2.96. There were 1,559
families (71.4% of all households); the average family size was 3.54. The population was spread out, with 1,892 people (28.7%) under the age of 18, 668 people (10.1%) aged 18 to 24, 1,681 people (25.5%) aged 25 to 44, 1,415 people (21.5%) aged 45 to 64, and 928 people (14.1%) who were 65 years of age or older. The median age was 33.1 years. For every 100 females, there were 94.3 males. For every 100 females age 18 and over, there were 91.6 males. There were 2,406 housing units at an average density of , of which 2,183 were occupied, of which 1,262 (57.8%) were owner-occupied, and 921 (42.2%) were occupied by renters. The homeowner vacancy rate was 2.6%; the rental vacancy rate was 6.5%. 3,829 people (58.2% of the population) lived in owner-occupied housing units and 2,643 people (40.1%) lived in rental housing units. ==Economy==