2020 census

The 2020 United States census counted 399 people, 181 households, and 109 families in Kensington.^[10][11] The population density was 1,191.0 per square mile (459.9/km²). There were 237 housing units at an average density of 707.5 per square mile (273.2/km²).^[11][12] The racial makeup was 94.74% (378) white or European American (94.74% non-Hispanic white), 0.75% (3) black or African-American, 0.25% (1) Native American or Alaska Native, 0.25% (1) Asian, 0.25% (1) Pacific Islander or Native Hawaiian, 0.25% (1) from other races, and 3.51% (14) from two or more races.^[13] Hispanic or Latino of any race was 1.0% (4) of the population.^[14]

Of the 181 households, 27.1% had children under the age of 18; 49.2% were married couples living together; 25.4% had a female householder with no spouse or partner present. 38.7% of households consisted of individuals and 19.9% had someone living alone who was 65 years of age or older.^[11] The average household size was 2.3 and the average family size was 2.8.^[15] The percent of those with a bachelor’s degree or higher was estimated to be 14.5% of the population.^[16]

23.8% of the population was under the age of 18, 4.5% from 18 to 24, 20.6% from 25 to 44, 22.1% from 45 to 64, and 29.1% who were 65 years of age or older. The median age was 46.8 years. For every 100 females, there were 96.6 males.^[11] For every 100 females ages 18 and older, there were 109.7 males.^[11]

The 2016-2020 5-year American Community Survey estimates show that the median household income was $52,083 (with a margin of error of +/- $9,186) and the median family income was $68,125 (+/- $24,243).^[17] Males had a median income of $48,750 (+/- $9,723) versus $26,406 (+/- $8,666) for females. The median income for those above 16 years old was $35,819 (+/- $6,414).^[18] Approximately, 1.4% of families and 2.6% of the population were below the poverty line, including 4.3% of those under the age of 18 and 3.6% of those ages 65 or over.^[19][20]

2010 census

As of the census^[21] of 2010, there were 473 people, 203 households, and 126 families living in the city. The population density was 1,313.9 inhabitants per square mile (507.3/km²). There were 261 housing units at an average density of 725.0 per square mile (279.9/km²). The racial makeup of the city was 97.7% White, 0.2% Native American, and 2.1% from two or more races. Hispanic or Latino of any race were 0.2% of the population.

There were 203 households, of which 23.6% had children under the age of 18 living with them, 53.2% were married couples living together, 4.9% had a female householder with no husband present, 3.9% had a male householder with no wife present, and 37.9% were non-families. 36.5% of all households were made up of individuals, and 23.1% had someone living alone who was 65 years of age or older. The average household size was 2.19 and the average family size was 2.78.

The median age in the city was 49.7 years. 21.6% of residents were under the age of 18; 4.2% were between the ages of 18 and 24; 18.6% were from 25 to 44; 26.6% were from 45 to 64; and 29% were 65 years of age or older. The gender makeup of the city was 46.3% male and 53.7% female.

2000 census

As of the census^[22] of 2000, there were 529 people, 231 households, and 140 families living in the city. The population density was 1,652.0 inhabitants per square mile (637.8/km²). There were 264 housing units at an average density of 824.5 per square mile (318.3/km²). The racial makeup of the city was 97.35% White, 0.19% African American, 0.19% from other races, and 2.27% from two or more races. Hispanic or Latino of any race were 0.76% of the population.

There were 231 households, out of which 23.4% had children under the age of 18 living with them, 54.1% were married couples living together, 3.9% had a female householder with no husband present, and 39.0% were non-families. 37.7% of all households were made up of individuals, and 27.3% had someone living alone who was 65 years of age or older. The average household size was 2.16 and the average family size was 2.79.

In the city, the population was spread out, with 21.6% under the age of 18, 5.5% from 18 to 24, 19.5% from 25 to 44, 21.0% from 45 to 64, and 32.5% who were 65 years of age or older. The median age was 48 years. For every 100 females, there were 81.8 males. For every 100 females age 18 and over, there were 78.9 males.

The median income for a household in the city was $29,219, and the median income for a family was $41,250. Males had a median income of $28,333 versus $16,607 for females. The per capita income for the city was $15,131. About 3.4% of families and 5.1% of the population were below the poverty line, including 4.5% of those under age 18 and 3.9% of those age 65 or over.