Climate

The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Gridley has a humid subtropical climate, abbreviated "Cfa" on climate maps.^[7]

2020 census

The 2020 United States census counted 313 people, 136 households, and 82 families in Gridley.^[8][9] The population density was 731.3 per square mile (282.4/km²). There were 160 housing units at an average density of 373.8 per square mile (144.3/km²).^[9][10] The racial makeup was 94.89% (297) white or European American (90.1% non-Hispanic white), 0.32% (1) black or African-American, 0.64% (2) Native American or Alaska Native, 0.0% (0) Asian, 0.32% (1) Pacific Islander or Native Hawaiian, 0.0% (0) from other races, and 3.83% (12) from two or more races.^[11] Hispanic or Latino of any race was 5.43% (17) of the population.^[12]

Of the 136 households, 23.5% had children under the age of 18; 50.0% were married couples living together; 19.9% had a female householder with no spouse or partner present. 36.0% of households consisted of individuals and 16.9% had someone living alone who was 65 years of age or older.^[9] The average household size was 2.3 and the average family size was 3.0.^[13] The percent of those with a bachelor’s degree or higher was estimated to be 10.5% of the population.^[14]

25.9% of the population was under the age of 18, 3.5% from 18 to 24, 22.0% from 25 to 44, 25.6% from 45 to 64, and 23.0% who were 65 years of age or older. The median age was 40.5 years. For every 100 females, there were 98.1 males.^[9] For every 100 females ages 18 and older, there were 95.0 males.^[9]

The 2016-2020 5-year American Community Survey estimates show that the median household income was $50,000 (with a margin of error of +/- $15,155) and the median family income was $53,750 (+/- $25,242).^[15] Males had a median income of $37,404 (+/- $3,842) versus $16,250 (+/- $12,864) for females. The median income for those above 16 years old was $30,625 (+/- $3,384).^[16] Approximately, 5.4% of families and 10.0% of the population were below the poverty line, including 7.8% of those under the age of 18 and 6.9% of those ages 65 or over.^[17][18]

2010 census

As of the census^[19] of 2010, there were 341 people, 144 households, and 93 families residing in the city. The population density was 831.7 inhabitants per square mile (321.1/km²). There were 174 housing units at an average density of 424.4 per square mile (163.9/km²). The racial makeup of the city was 97.7% White, 0.9% African American, 0.3% Native American, 0.3% from other races, and 0.9% from two or more races. Hispanic or Latino of any race were 0.3% of the population.

There were 144 households, of which 31.3% had children under the age of 18 living with them, 52.8% were married couples living together, 7.6% had a female householder with no husband present, 4.2% had a male householder with no wife present, and 35.4% were non-families. 32.6% of all households were made up of individuals, and 17.4% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 2.98.

The median age in the city was 37.9 years. 26.7% of residents were under the age of 18; 9.3% were between the ages of 18 and 24; 20.9% were from 25 to 44; 24.7% were from 45 to 64; and 18.5% were 65 years of age or older. The gender makeup of the city was 49.3% male and 50.7% female.

2000 census

As of the census^[20] of 2000, there were 372 people, 158 households, and 106 families residing in the city. The population density was 992.9 inhabitants per square mile (383.4/km²). There were 168 housing units at an average density of 448.4 per square mile (173.1/km²). The racial makeup of the city was 96.77% White, 0.81% African American, 0.54% Native American, 0.27% Asian, 0.27% from other races, and 1.34% from two or more races. Hispanic or Latino of any race were 0.81% of the population.

There were 158 households, out of which 26.6% had children under the age of 18 living with them, 58.9% were married couples living together, 5.1% had a female householder with no husband present, and 32.3% were non-families. 26.6% of all households were made up of individuals, and 18.4% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.86.

In the city, the population was spread out, with 26.1% under the age of 18, 5.4% from 18 to 24, 22.6% from 25 to 44, 21.8% from 45 to 64, and 24.2% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 100.0 males. For every 100 females age 18 and over, there were 92.3 males.

The median income for a household in the city was $26,346, and the median income for a family was $40,313. Males had a median income of $25,694 versus $19,375 for females. The per capita income for the city was $18,805. About 7.9% of families and 10.7% of the population were below the poverty line, including 3.4% of those under age 18 and 16.1% of those age 65 or over.