Plainfield is a town in Guilford, Liberty and Washington townships, Hendricks County, Indiana, United States. The population was 27,631 at the 2010 census. Plainfield is located at 39°41′51″N 86°23′5″W / 39.6975°N 86.38472°W / 39.6975; -86.38472 . According to the 2010 census, the town has a total area of 22.38 square miles , of which 22.27 square miles is land and 0.11 square miles is water. As of the census of 2000, there were 18,396 people, 7,051 households, and 4,914 families residing in the town. The population... density was 1,023.1 people per square mile . There were 7,449 housing units at an average density of 414.3 per square mile . The racial makeup of the town was 95.11% White, 2.23% African American, 0.32% Native American, 0.91% Asian, 0.02% Pacific Islander, 0.36% from other races, and 1.06% from two or more races. Hispanic or Latino of any race were 1.36% of the population. There were 7,051 households out of which 34.7% had children under the age of 18 living with them, 55.2% were married couples living together, 10.
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| County: | Hendricks County |
| State: | Indiana |
| Country: | United States of America |
| Population: | 28,527 |
| Area: | 18.1 sq. mi. |
| Time zone: | North American Eastern Time Zone |
| Also known as: | Plainfield, Indiana, Hendricks County / Plainfield town |