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: 10.98% 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.

Being a small city, Greencastle does not have a public transit system used by locals to get to and from work.

In terms of college education, Greencastle is somewhat better educated than the 21.84% who have a 4-year degree or higher in the typical US community: 25.76% of adults 25 and older in the city have at least a bachelor's degree.

The per capita income in Greencastle in 2022 was $26,642, which is lower middle income relative to Indiana and the nation. This equates to an annual income of $106,568 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 Black or African-American. Important ancestries of people in Greencastle include German, English, Irish, Italian, and Scottish.

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