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. Much of the housing stock in Plainfield was built relatively recently. The construction of new real estate can often be taken as an indication that the local Plainfield economy is robust, and that jobs or other amenities are attracting an influx of new residents. 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.

One interesting thing about the economy is that relatively large numbers of people worked from their home: 12.85% of the workforce. While this number may seem small overall, as a fraction of the total workforce this is high compared to the rest of the county. 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.

The education level of Plainfield citizens is substantially higher than the typical US community, as 31.31% of adults in Plainfield have at least a bachelor's degree.

The per capita income in Plainfield in 2018 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.