Plainfield is a medium-sized town located in the state of Indiana. With a population of 36,074 people and six associated neighborhoods, Plainfield is the 28th largest community in Indiana. Plainfield has seen a significant amount of newer housing growth in recent years. Quite often, new home construction is the result of new residents moving in who are middle class or wealthier, attracted by jobs, a healthy local economy, or other amenities as they leave nearby or far away areas for greener pastures. This seems to be the case in Plainfield, where the median household income is $77,249.00.

Also of interest is that Plainfield has more people living here who work in computers and math than 95% of the places in the US.

Telecommuters are a relatively large percentage of the workforce: 12.85% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

In terms of college education, Plainfield is substantially better educated than the typical community in the nation, which has 21.84% of the adults holding a bachelor's degree or graduate degree: 31.31% of adults in Plainfield have a college degree.

The per capita income in Plainfield in 2022 was $41,433, which is wealthy relative to Indiana, and upper middle income relative to the rest of the US. This equates to an annual income of $165,732 for a family of four. However, Plainfield contains both very wealthy and poor people as well.

Plainfield is a very ethnically-diverse town. The people who call Plainfield home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Plainfield residents report their race to be White, followed by Black or African-American. Important ancestries of people in Plainfield include German, English, Irish, Italian, and Ethiopian.

The most common language spoken in Plainfield is English. Other important languages spoken here include Spanish and Langs. of India.