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Duncan, Iowa
Duncan, Iowa
Census-designated place
	Duncan Duncan
	Coordinates: 43°6′16″N 93°42′40″W / 43.10444°N 93.71111°W
Country	United States
State	Iowa
County	Hancock
Area
• Total	0.79 sq mi (2.05 km2)
• Land	0.79 sq mi (2.03 km2)
• Water	0.01 sq mi (0.02 km2)
Elevation	1,237 ft (377 m)
Population (2020)
• Total	57
• Density	72.61/sq mi (28.02/km2)
Time zone	UTC-6 (CST)
ZIP code	50423
Area code	641
FIPS code	19-22710
GNIS feature ID	0456058

Duncan is a census-designated place (CDP) in Hancock County, Iowa, United States. The population was 57 at the 2020 census.

History

Duncan was platted in 1900.^[2] The community's population was 25 in 1902,^[3] and 20 in 1925.^[4] The population was 75 in 1940.^[5]

Geography

Duncan is located at 43°6′16″N 93°42′40″W / 43.10444°N 93.71111°W / 43.10444; -93.71111,^[6] 4.6 miles (7.4 km) east of Britt and 5.4 miles (8.7 km) west of Garner, along U.S. Route 18.

According to the United States Census Bureau, the CDP has a total area of 0.79 square miles (2.05 km²), of which 0.78 square miles (2.03 km²) is land and 0.0077 square miles (0.02 km²), or 0.90%, is water.^[7]

Demographics

Historical population
Census	Pop.	%±
2010	131	—
2020	57	−56.5%
U.S. Decennial Census^[8]

2020 census

As of the census of 2020,^[9] there were 57 people, 32 households, and 23 families residing in the community. The population density was 72.6 inhabitants per square mile (28.0/km²). There were 32 housing units at an average density of 40.7 per square mile (15.7/km²). The racial makeup of the community was 98.2% White, 0.0% Black or African American, 0.0% Native American, 0.0% Asian, 0.0% Pacific Islander, 0.0% from other races and 1.8% from two or more races. Hispanic or Latino persons of any race comprised 0.0% of the population.

Of the 32 households, 37.5% of which had children under the age of 18 living with them, 68.8% were married couples living together, 9.4% were cohabitating couples, 3.1% had a female householder with no spouse or partner present and 18.8% had a male householder with no spouse or partner present. 28.1% of all households were non-families. 21.9% of all households were made up of individuals, 9.4% had someone living alone who was 65 years old or older.

The median age in the community was 48.3 years. 17.5% of the residents were under the age of 20; 1.8% were between the ages of 20 and 24; 26.3% were from 25 and 44; 24.6% were from 45 and 64; and 29.8% were 65 years of age or older. The gender makeup of the community was 63.2% male and 36.8% female.