2020 census

The 2020 United States census counted 83 people, 26 households, and 19 families in Cullison.^[8][9] The population density was 479.8 per square mile (185.2/km²). There were 64 housing units at an average density of 369.9 per square mile (142.8/km²).^[9][10] The racial makeup was 85.54% (71) white or European American (85.54% non-Hispanic white), 1.2% (1) black or African-American, 0.0% (0) Native American or Alaska Native, 0.0% (0) Asian, 0.0% (0) Pacific Islander or Native Hawaiian, 0.0% (0) from other races, and 13.25% (11) from two or more races.^[11] Hispanic or Latino of any race was 7.23% (6) of the population.^[12]

Of the 26 households, 19.2% had children under the age of 18; 57.7% were married couples living together; 15.4% had a female householder with no spouse or partner present. 26.9% of households consisted of individuals and 11.5% had someone living alone who was 65 years of age or older.^[9] The average household size was 2.5 and the average family size was 3.7.^[13] The percent of those with a bachelor’s degree or higher was estimated to be 7.2% of the population.^[14]

19.3% of the population was under the age of 18, 14.5% from 18 to 24, 14.5% from 25 to 44, 28.9% from 45 to 64, and 22.9% who were 65 years of age or older. The median age was 46.5 years. For every 100 females, there were 124.3 males.^[9] For every 100 females ages 18 and older, there were 109.4 males.^[9]

The 2016-2020 5-year American Community Survey estimates show that the median household income was $38,750 (with a margin of error of +/- $24,907).^[15] Males had a median income of $32,083 (+/- $19,031) versus $21,250 (+/- $8,134) for females. The median income for those above 16 years old was $28,125 (+/- $11,955).^[16] Approximately, 5.6% of families and 11.0% of the population were below the poverty line, including 33.3% of those under the age of 18 and 21.4% of those ages 65 or over.^[17][18]

2010 census

As of the census^[19] of 2010, there were 101 people, 37 households, and 28 families residing in the city. The population density was 594.1 inhabitants per square mile (229.4/km²). There were 44 housing units at an average density of 258.8 per square mile (99.9/km²). The racial makeup of the city was 94.1% White, 3.0% from other races, and 3.0% from two or more races. Hispanic or Latino of any race were 3.0% of the population.

There were 37 households, of which 35.1% had children under the age of 18 living with them, 62.2% were married couples living together, 2.7% had a female householder with no husband present, 10.8% had a male householder with no wife present, and 24.3% were non-families. 21.6% of all households were made up of individuals, and 5.4% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.14.

The median age in the city was 31.8 years. 28.7% of residents were under the age of 18; 10.8% were between the ages of 18 and 24; 23.8% were from 25 to 44; 24.7% were from 45 to 64; and 11.9% were 65 years of age or older. The gender makeup of the city was 58.4% male and 41.6% female.

2000 census

As of the census^[20] of 2000, there were 98 people, 43 households, and 27 families residing in the city. The population density was 559.0 inhabitants per square mile (215.8/km²). There were 54 housing units at an average density of 308.0 per square mile (118.9/km²). The racial makeup of the city was 90.82% White, 5.10% from other races, and 4.08% from two or more races. Hispanic or Latino of any race were 8.16% of the population.

There were 43 households, out of which 25.6% had children under the age of 18 living with them, 60.5% were married couples living together, 4.7% had a female householder with no husband present, and 34.9% were non-families. 34.9% of all households were made up of individuals, and 16.3% had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 2.96.

In the city, the population was spread out, with 21.4% under the age of 18, 11.2% from 18 to 24, 18.4% from 25 to 44, 28.6% from 45 to 64, and 20.4% who were 65 years of age or older. The median age was 45 years. For every 100 females, there were 108.5 males. For every 100 females age 18 and over, there were 108.1 males.

The median income for a household in the city was $20,625, and the median income for a family was $31,250. Males had a median income of $26,000 versus $12,083 for females. The per capita income for the city was $15,508. There were 13.0% of families and 9.9% of the population living below the poverty line, including no under eighteens and none of those over 64.