Greencastle is a somewhat small city located in the state of Indiana. With a population of 9,882 people and four associated neighborhoods, Greencastle is the 86th largest community in Indiana.

One interesting thing about the economy is that relatively large numbers of people worked from their home: 12.47% 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.

Greencastle is a small town where college students really create the town feel and character. So many small towns have lost population over the last 20-30 years that having the local college presence in the Greencastle area, with all of the energy of the students filling area dorms and apartments each fall, really helps Greencastle maintain a good economy.

Greencastle is a small city, and as such doesn't have a public transit system that people use to get to and from their jobs every day.

The education level of Greencastle citizens is a little higher than the average for US cities and towns: 24.69% of adults in Greencastle have at least a bachelor's degree.

The per capita income in Greencastle in 2022 was $24,637, which is low income relative to Indiana, and lower middle income relative to the rest of the US. This equates to an annual income of $98,548 for a family of four. However, Greencastle contains both very wealthy and poor people as well.

Greencastle is a somewhat ethnically-diverse city. The people who call Greencastle home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Greencastle residents report their race to be White, followed by Asian. Important ancestries of people in Greencastle include German, English, Irish, Scottish, and Italian.

The most common language spoken in Greencastle is English. Other important languages spoken here include Spanish and Chinese.