| Plainville, Illinois | |
| Settlement Type: | Village |
| Mapsize: | 260px |
| Image Map1: | Illinois in United States (US48).svg |
| Map Caption1: | Location of Illinois in the United States |
| Coordinates: | 39.7844°N -91.1839°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Adams |
| Subdivision Type3: | Township |
| Subdivision Name3: | Payson |
| Established Title: | Founded |
| Leader Title: | Mayor |
| Leader Title1: | Village president |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 0.23 |
| Area Land Sq Mi: | 0.23 |
| Area Water Sq Mi: | 0.00 |
| Area Water Percent: | 0 |
| Elevation Ft: | 689 |
| Population As Of: | 2020 |
| Population Total: | 271 |
| Population Density Sq Mi: | 1153.19 |
| Timezone1: | CST |
| Utc Offset1: | -6 |
| Timezone1 Dst: | CDT |
| Utc Offset1 Dst: | -5 |
| Postal Code Type: | ZIP Code(s) |
| Postal Code: | 62365 |
| Area Code: | 217 |
| Blank Name: | FIPS code |
| Blank Info: | 17-60339 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2399685 |
| Blank2 Name Sec2: | Wikimedia Commons |
| Blank2 Info Sec2: | Plainville, Illinois |
| Area Total Km2: | 0.61 |
| Area Land Km2: | 0.61 |
| Area Water Km2: | 0.00 |
| Population Density Km2: | 445.76 |
Plainville is a village in Adams County, Illinois, United States. The population was 271 at the 2020 census. It is part of the Quincy, IL - MO Micropolitan Statistical Area.
Plainville was originally called Stone's Prairie after Samuel Stone who settled here in 1822.[2]
In the 1860 presidential election campaign, Plainville was the site of a political rally involving around 7,000 people. This resulted in the "Stone's Prairie Riot" on August 25, 1860, at which the Republican Party para-military organization, the "Wide Awakes", confronted armed supporters of the Democratic Party.[3]
Plainville is located at 39.7844°N -91.1839°W (39.784364, -91.183868).[4]
According to the 2021 census gazetteer files, Plainville has a total area of 0.24sqmi, all land.[5]
As of the 2020 census[6] there were 271 people, 104 households, and 63 families residing in the village. The population density was 1153.19PD/sqmi. There were 112 housing units at an average density of 476.6/sqmi. The racial makeup of the village was 91.88% White, 1.11% Pacific Islander, and 7.01% from two or more races. Hispanic or Latino of any race were 1.48% of the population.
There were 104 households, out of which 27.9% had children under the age of 18 living with them, 50.00% were married couples living together, 5.77% had a female householder with no husband present, and 39.42% were non-families. 32.69% of all households were made up of individuals, and 7.69% had someone living alone who was 65 years of age or older. The average household size was 3.52 and the average family size was 2.74.
The village's age distribution consisted of 26.7% under the age of 18, 3.5% from 18 to 24, 27% from 25 to 44, 28.1% from 45 to 64, and 14.7% who were 65 years of age or older. The median age was 36.8 years. For every 100 females, there were 163.9 males. For every 100 females age 18 and over, there were 137.5 males.
The median income for a household in the village was $50,500, and the median income for a family was $71,875. Males had a median income of $41,786 versus $22,083 for females. The per capita income for the village was $22,803. About 7.9% of families and 17.2% of the population were below the poverty line, including 25.0% of those under age 18 and 2.4% of those age 65 or over.