|• Total||40.32 sq mi (104.43 km2)|
|• Land||38.67 sq mi (100.15 km2)|
|• Water||1.65 sq mi (4.27 km2)|
|Elevation||509 ft (155 m)|
|• Estimate (2012)||936|
|• Density||24.3/sq mi (9.4/km2)|
|Time zone||Eastern (EST) (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|GNIS feature ID||0579051|
According to the United States Census Bureau, the town has a total area of 40.32 square miles (104.43 km2), of which, 38.67 square miles (100.15 km2) of it is land and 1.65 square miles (4.27 km2) is water.
This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. According to the Köppen Climate Classification system, Harmony has a humid continental climate, abbreviated "Dfb" on climate maps.
As of the census of 2010, there were 939 people, 399 households, and 273 families residing in the town. The population density was 24.3 inhabitants per square mile (9.4/km2). There were 608 housing units at an average density of 15.7 per square mile (6.1/km2). The racial makeup of the town was 96.5% White, 0.1% African American, 0.4% Native American, 0.7% Asian, 0.3% from other races, and 1.9% from two or more races. Hispanic or Latino of any race were 0.5% of the population.
There were 399 households of which 24.3% had children under the age of 18 living with them, 54.6% were married couples living together, 7.8% had a female householder with no husband present, 6.0% had a male householder with no wife present, and 31.6% were non-families. 25.3% of all households were made up of individuals and 13.1% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.79.
The median age in the town was 49.4 years. 19.1% of residents were under the age of 18; 3.8% were between the ages of 18 and 24; 19.9% were from 25 to 44; 36.2% were from 45 to 64; and 20.9% were 65 years of age or older. The gender makeup of the town was 50.1% male and 49.9% female.
As of the census of 2000, there were 954 people, 388 households, and 301 families residing in the town. The population density was 24.6 people per square mile (9.5/km²). There were 522 housing units at an average density of 13.5 per square mile (5.2/km²). The racial makeup of the town was 97.59% White, 0.94% Native American, 0.42% Asian, 0.21% from other races, and 0.84% from two or more races.
There were 388 households out of which 25.8% had children under the age of 18 living with them, 60.3% were married couples living together, 10.3% had a female householder with no husband present, and 22.4% were non-families. 17.5% of all households were made up of individuals and 8.5% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.70.
In the town the population was spread out with 20.5% under the age of 18, 6.2% from 18 to 24, 25.8% from 25 to 44, 29.1% from 45 to 64, and 18.3% who were 65 years of age or older. The median age was 44 years. For every 100 females there were 96.7 males. For every 100 females age 18 and over, there were 94.9 males.
The median income for a household in the town was $23,843, and the median income for a family was $26,131. Males had a median income of $23,036 versus $18,056 for females. The per capita income for the town was $12,360. About 16.1% of families and 20.3% of the population were below the poverty line, including 25.1% of those under age 18 and 14.4% of those age 65 or over.
- Freeman Knowles, U. S. congressman from South Dakota
- Clyde Smith, U. S. congressman and husband of Margaret Chase Smith
- Bartlett Tripp, Chief Justice of the Dakota Territory Supreme Court 1885-9, lawyer, and diplomat
- "US Gazetteer files 2010". United States Census Bureau. Retrieved 2012-12-16.
- "American FactFinder". United States Census Bureau. Retrieved 2012-12-16.
- "Population Estimates". United States Census Bureau. Retrieved 2013-07-06.
- Climate Summary for Harmony, Maine
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- Graveyard Shift Locations Internet Movie Database, Retrieved June 28, 2008
The Patriarch's Club (a local non-profit club) sponsors a Labor Day Fair.