2020 census

The 2020 United States census counted 41 people, 25 households, and 19 families in Athol.^[9][10] The population density was 221.6 per square mile (85.6/km²). There were 25 housing units at an average density of 135.1 per square mile (52.2/km²).^[10][11] The racial makeup was 100.0% (41) 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 25 households, 28.0% had children under the age of 18; 56.0% were married couples living together; 12.0% had a female householder with no spouse or partner present. 20.0% of households consisted of individuals and 4.0% had someone living alone who was 65 years of age or older.^[10] The average household size was 2.2 and the average family size was 2.6.^[14] The percent of those with a bachelor’s degree or higher was estimated to be 17.1% of the population.^[15]

14.6% of the population was under the age of 18, 2.4% from 18 to 24, 26.8% from 25 to 44, 24.4% from 45 to 64, and 31.7% who were 65 years of age or older. The median age was 46.8 years. For every 100 females, there were 64.0 males.^[10] For every 100 females ages 18 and older, there were 59.1 males.^[10]

The 2016-2020 5-year American Community Survey estimates show that the median family income was $38,750 (+/- $28,485).^[16] Females had a median income of $18,250 (+/- $3,932). The median income for those above 16 years old was $17,750 (+/- $2,936).^[17] Approximately, 25.0% of families and 35.5% of the population were below the poverty line, including 100.0% of those under the age of 18 and 0.0% of those ages 65 or over.^[18][19]

2010 census

As of the census^[20] of 2010, there were 44 people, 17 households, and 14 families residing in the city. The population density was 244.4 inhabitants per square mile (94.4/km²). There were 26 housing units at an average density of 144.4 per square mile (55.8/km²). The racial makeup of the city was 88.6% White and 11.4% from two or more races.

There were 17 households, of which 29.4% had children under the age of 18 living with them, 76.5% were married couples living together, 5.9% had a female householder with no husband present, and 17.6% were non-families. 17.6% of all households were made up of individuals, and 5.9% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 2.86.

The median age in the city was 41 years. 25% of residents were under the age of 18; 4.7% were between the ages of 18 and 24; 25% were from 25 to 44; 31.8% were from 45 to 64; and 13.6% were 65 years of age or older. The gender makeup of the city was 43.2% male and 56.8% female.

2000 census

As of the census^[21] of 2000, there were 51 people, 25 households, and 14 families residing in the city. The population density was 287.0 inhabitants per square mile (110.8/km²). There were 27 housing units at an average density of 152.0 per square mile (58.7/km²). The racial makeup of the city was 96.08% White and 3.92% from two or more races.

There were 25 households, out of which 24.0% had children under the age of 18 living with them, 52.0% were married couples living together, and 44.0% were non-families. 44.0% of all households were made up of individuals, and 40.0% had someone living alone who was 65 years of age or older. The average household size was 2.04 and the average family size was 2.79.

In the city, the population was spread out, with 19.6% under the age of 18, 5.9% from 18 to 24, 15.7% from 25 to 44, 35.3% from 45 to 64, and 23.5% who were 65 years of age or older. The median age was 48 years. For every 100 females, there were 112.5 males. For every 100 females age 18 and over, there were 95.2 males.

The median income for a household in the city was $28,250, and the median income for a family was $34,375. Males had a median income of $11,250 versus $18,750 for females. The per capita income for the city was $14,872. There were 13.3% of families and 8.5% of the population living below the poverty line, including no under eighteens and 11.8% of those over 64.