2020 census

The 2020 United States census counted 1,036 people, 415 households, and 305 families in Harmony. The population density was 352.0 per square mile (135.9/km²). There were 489 housing units at an average density of 166.2 per square mile (64.2/km²). ^[9][10] The racial makeup was 91.22% (945) white or European American (90.25% non-Hispanic white), 1.83% (19) black or African-American, 0.1% (1) Native American or Alaska Native, 0.1% (1) Asian, 0.0% (0) Pacific Islander or Native Hawaiian, 1.64% (17) from other races, and 5.12% (53) from two or more races.^[11] Hispanic or Latino of any race was 3.67% (38) of the population.^[12]

Of the 415 households, 22.4% had children under the age of 18; 56.4% were married couples living together; 18.8% had a female householder with no spouse or partner present. 24.6% of households consisted of individuals and 7.5% had someone living alone who was 65 years of age or older.^[9] The average household size was 2.9 and the average family size was 3.3.^[13] The percent of those with a bachelor’s degree or higher was estimated to be 30.5% of the population.^[14]

19.8% of the population was under the age of 18, 8.0% from 18 to 24, 19.8% from 25 to 44, 35.0% from 45 to 64, and 17.4% who were 65 years of age or older. The median age was 48.5 years. For every 100 females, the population had 95.8 males.^[9] For every 100 females ages 18 and older, there were 104.7 males.^[9]

The 2016-2020 5-year American Community Survey estimates show that the median household income was $79,318 (with a margin of error of +/- $23,977) and the median family income was $90,662 (+/- $51,841). Males had a median income of $42,250 (+/- $36,909) versus $41,506 (+/- $9,376) for females.^[15] The median income for those above 16 years old was $41,658 (+/- $5,707).^[16] Approximately, 5.9% of families and 9.4% of the population were below the poverty line, including 6.4% of those under the age of 18 and 0.0% of those ages 65 or over.^[17][18]