2020 census

The 2020 United States census counted 47 people, 21 households, and 12 families in Manchester.^[9][10] The population density was 293.8 per square mile (113.4/km²). There were 40 housing units at an average density of 250.0 per square mile (96.5/km²).^[10][11] The racial makeup was 100.0% (47) white or European American (100.0% 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 0.0% (0) from two or more races.^[12] Hispanic or Latino of any race was 0.0% (0) of the population.^[13]

Of the 21 households, 9.5% had children under the age of 18; 42.9% were married couples living together; 33.3% had a female householder with no spouse or partner present. 33.3% of households consisted of individuals and 9.5% had someone living alone who was 65 years of age or older.^[10] The average household size was 2.5 and the average family size was 3.2.^[14]

12.8% of the population was under the age of 18, 4.3% from 18 to 24, 17.0% from 25 to 44, 46.8% from 45 to 64, and 19.1% who were 65 years of age or older. The median age was 50.5 years. For every 100 females, there were 176.5 males.^[10] For every 100 females ages 18 and older, there were 173.3 males.^[10]

The 2016-2020 5-year American Community Survey estimates show that the median household income was $47,500 (with a margin of error of +/- $42,864) and the median family income was $86,250 (+/- $73,940).^[15] The median income for those above 16 years old was $34,167 (+/- $18,570).^[16]

2010 census

As of the census^[17] of 2010, there were 95 people, 38 households, and 24 families living in the city. The population density was 380.0 inhabitants per square mile (146.7/km²). There were 60 housing units at an average density of 240.0 per square mile (92.7/km²). The racial makeup of the city was 92.6% White, 4.2% Native American, 1.1% from other races, and 2.1% from two or more races. Hispanic or Latino of any race were 1.1% of the population.

There were 38 households, of which 34.2% had children under the age of 18 living with them, 36.8% were married couples living together, 18.4% had a female householder with no husband present, 7.9% had a male householder with no wife present, and 36.8% were non-families. 31.6% of all households were made up of individuals, and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.21.

The median age in the city was 35.9 years. 31.6% of residents were under the age of 18; 3.1% were between the ages of 18 and 24; 26.4% were from 25 to 44; 30.5% were from 45 to 64; and 8.4% were 65 years of age or older. The gender makeup of the city was 54.7% male and 45.3% female.

2000 census

As of the census^[18] of 2000, there were 102 people, 46 households, and 31 families living in the city. The population density was 398.7 inhabitants per square mile (153.9/km²). There were 52 housing units at an average density of 203.3 per square mile (78.5/km²). The racial makeup of the city was 91.18% White, 0.98% African American, 0.98% Native American, 0.98% from other races, and 5.88% from two or more races. Hispanic or Latino of any race were 0.98% of the population.

There were 46 households, out of which 23.9% had children under the age of 18 living with them, 56.5% were married couples living together, 8.7% had a female householder with no husband present, and 32.6% were non-families. 26.1% of all households were made up of individuals, and 13.0% had someone living alone who was 65 years of age or older. The average household size was 2.22 and the average family size was 2.55.

In the city, the population was spread out, with 19.6% under the age of 18, 3.9% from 18 to 24, 29.4% from 25 to 44, 29.4% from 45 to 64, and 17.6% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 121.7 males. For every 100 females age 18 and over, there were 121.6 males.

The median income for a household in the city was $31,563, and the median income for a family was $32,500. Males had a median income of $22,500 versus $16,500 for females. The per capita income for the city was $14,035. There were 6.3% of families and 7.8% of the population living below the poverty line, including 12.0% of under eighteens and none of those over 64.