Allenville is a village in Moultrie County, Illinois, United States. The population was 132 at the 2020 census.^[3]

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Allenville, Illinois
Village
Location in Moultrie County, Illinois
Allenville Location in the United States
Coordinates: 39°33′30″N 88°32′19″W[1]
Country	United States
State	Illinois
County	Moultrie
Township	East Nelson
Area [2]
• Total	0.61 sq mi (1.58 km2)
• Land	0.61 sq mi (1.58 km2)
• Water	0.00 sq mi (0.00 km2)
Elevation [1]	640 ft (200 m)
Population  (2020)[3]
• Total	132
• Density	216.75/sq mi (83.70/km2)
Time zone	UTC-6 (CST)
• Summer (DST)	UTC-5 (CDT)
ZIP Code	61951
Area code	217
FIPS code	17-00867
GNIS ID	2397937[1]

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Allenville is in southeastern Moultrie County along Illinois Route 121, which leads northwest 7 miles (11 km) to Sullivan, the county seat, and southeast 11 miles (18 km) to Mattoon.

According to the U.S. Census Bureau, Allenville has a total area of 0.61 square miles (1.58 km²), all land.^[2] Coon Creek runs through the west side of the village, flowing north toward the Kaskaskia River in Lake Shelbyville.

As of the census^[5] of 2000, there were 154 people, 61 households, and 42 families residing in the village. The population density was 264.4 inhabitants per square mile (102.1/km²). There were 72 housing units at an average density of 123.6 per square mile (47.7/km²). The racial makeup of the village was 100.00% White.

There were 61 households, out of which 18.0% had children under the age of 18 living with them, 60.7% were married couples living together, 4.9% had a female householder with no husband present, and 31.1% were non-families. 26.2% 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 2.52 and the average family size was 3.10.

In the village, the population was spread out, with 16.9% under the age of 18, 10.4% from 18 to 24, 20.8% from 25 to 44, 38.3% from 45 to 64, and 13.6% who were 65 years of age or older. The median age was 46 years. For every 100 females, there were 113.9 males. For every 100 females age 18 and over, there were 109.8 males.

The median income for a household in the village was $46,146, and the median income for a family was $48,750. Males had a median income of $31,250 versus $20,000 for females. The per capita income for the village was $16,586. About 4.0% of families and 7.7% of the population were below the poverty line, including none of those under the age of eighteen or sixty five or over.