2020 census

The 2020 United States census counted 117 people, 52 households, and 34 families in Bendena.^[7][8] The population density was 76.5 per square mile (29.5/km²). There were 59 housing units at an average density of 38.6 per square mile (14.9/km²).^[8][9] The racial makeup was 93.16% (109) white or European American (91.45% non-Hispanic white), 0.0% (0) 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 6.84% (8) from two or more races.^[10] Hispanic or Latino of any race was 3.42% (4) of the population.^[11]

Of the 52 households, 28.8% had children under the age of 18; 55.8% were married couples living together; 26.9% had a female householder with no spouse or partner present. 30.8% of households consisted of individuals and 21.2% had someone living alone who was 65 years of age or older.^[8] The average household size was 2.0 and the average family size was 2.7.^[12] The percent of those with a bachelor’s degree or higher was estimated to be 40.2% of the population.^[13]

18.8% of the population was under the age of 18, 6.0% from 18 to 24, 20.5% from 25 to 44, 28.2% from 45 to 64, and 26.5% who were 65 years of age or older. The median age was 56.3 years. For every 100 females, there were 101.7 males.^[8] For every 100 females ages 18 and older, there were 126.2 males.^[8]

The 2016-2020 5-year American Community Survey estimates show that the median household income was $50,938 (with a margin of error of +/- $33,623) and the median family income was $106,250 (+/- $25,114).^[14] Males had a median income of $41,719 (+/- $18,626) versus $38,750 (+/- $7,568) for females. The median income for those above 16 years old was $40,938 (+/- $6,065).^[15] Approximately, 0.0% of families and 5.6% of the population were below the poverty line, including 0.0% of those under the age of 18 and 0.0% of those ages 65 or over.^[16][17]