2020 census

The 2020 United States census counted 122 people, 39 households, and 28 families in Alden.^[9][10] The population density was 787.1 per square mile (303.9/km²). There were 61 housing units at an average density of 393.5 per square mile (151.9/km²).^[10][11] The racial makeup was 94.26% (115) white or European American (94.26% non-Hispanic white), 0.82% (1) black or African-American, 0.82% (1) Native American or Alaska Native, 0.0% (0) Asian, 0.0% (0) Pacific Islander or Native Hawaiian, 0.82% (1) from other races, and 3.28% (4) from two or more races.^[12] Hispanic or Latino of any race was 1.64% (2) of the population.^[13]

Of the 39 households, 20.5% had children under the age of 18; 59.0% were married couples living together; 20.5% had a female householder with no spouse or partner present. 25.6% of households consisted of individuals and 17.9% had someone living alone who was 65 years of age or older.^[10] The average household size was 2.4 and the average family size was 2.7.^[14] The percent of those with a bachelor’s degree or higher was estimated to be 15.6% of the population.^[15]

20.5% of the population was under the age of 18, 4.9% from 18 to 24, 19.7% from 25 to 44, 34.4% from 45 to 64, and 20.5% who were 65 years of age or older. The median age was 48.7 years. For every 100 females, there were 103.3 males.^[10] For every 100 females ages 18 and older, there were 90.2 males.^[10]

The 2016-2020 5-year American Community Survey estimates show that the median household income was $54,792 (with a margin of error of +/- $7,013) and the median family income was $55,208 (+/- $4,774).^[16] Males had a median income of $32,500 (+/- $15,740) versus $38,750 (+/- $25,575) for females. The median income for those above 16 years old was $33,125 (+/- $9,302).^[17] Approximately, 11.4% of families and 25.8% of the population were below the poverty line, including 68.8% of those under the age of 18 and 8.3% of those ages 65 or over.^[18][19]

2010 census

As of the census^[20] of 2010, there were 148 people, 61 households, and 47 families residing in the city. The population density was 778.9 inhabitants per square mile (300.7/km²). There were 80 housing units at an average density of 421.1 per square mile (162.6/km²). The racial makeup of the city was 94.6% White, 0.7% Asian, and 4.7% from two or more races. Hispanic or Latino of any race were 1.4% of the population.

There were 61 households, of which 29.5% had children under the age of 18 living with them, 70.5% were married couples living together, 3.3% had a female householder with no husband present, 3.3% had a male householder with no wife present, and 23.0% were non-families. 21.3% of all households were made up of individuals, and 9.8% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.79.

The median age in the city was 44 years. 22.3% of residents were under the age of 18; 6.2% were between the ages of 18 and 24; 23.7% were from 25 to 44; 28.4% were from 45 to 64; and 19.6% were 65 years of age or older. The gender makeup of the city was 52.0% male and 48.0% female.

2000 census

As of the census^[21] of 2000, there were 168 people, 73 households, and 52 families residing in the city. The population density was 886.7 inhabitants per square mile (342.4/km²). There were 85 housing units at an average density of 448.6 per square mile (173.2/km²). The racial makeup of the city was 99.40% White, and 0.60% from two or more races. Hispanic or Latino of any race were 2.98% of the population.

There were 73 households, out of which 19.2% had children under the age of 18 living with them, 67.1% were married couples living together, 2.7% had a female householder with no husband present, and 27.4% were non-families. 26.0% of all households were made up of individuals, and 16.4% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 2.77.

In the city, the population was spread out, with 22.0% under the age of 18, 6.0% from 18 to 24, 25.6% from 25 to 44, 22.6% from 45 to 64, and 23.8% who were 65 years of age or older. The median age was 43 years. For every 100 females, there were 100.0 males. For every 100 females age 18 and over, there were 92.6 males.

The median income for a household in the city was $36,442, and the median income for a family was $36,827. Males had a median income of $26,500 versus $18,333 for females. The per capita income for the city was $21,908. None of the families and 1.1% of the population were living below the poverty line, including no under eighteens and 6.9% of those over 64.