Mount Joy is a somewhat small borough located in the state of Pennsylvania. With a population of 8,323 people and four associated neighborhoods, Mount Joy is the 144th largest community in Pennsylvania. Mount Joy has an unusually large stock of pre-World War II architecture, making it one of the older and more historic boroughs.

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

A relatively large number of people in Mount Joy telecommute to their jobs. Overall, about 8.38% of the workforce works from home. While this may seem like a small number, as a fraction of the total workforce it ranks among the highest in the country. 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 overall education level of Mount Joy is somewhat higher than in the average US city of 21.84%: 28.79% of adults 25 and older in the borough have at least a bachelor's degree.

The per capita income in Mount Joy in 2022 was $39,693, which is upper middle income relative to Pennsylvania and the nation. This equates to an annual income of $158,772 for a family of four. However, Mount Joy contains both very wealthy and poor people as well.

Mount Joy is a somewhat ethnically-diverse borough. The people who call Mount Joy home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Mount Joy residents report their race to be White, followed by Black or African-American. Mount Joy also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 13.38% of the borough’s residents. Important ancestries of people in Mount Joy include German, Irish, English, Italian, and Swiss.

The most common language spoken in Mount Joy is English. Other important languages spoken here include Spanish and Vietnamese.