Derry is a very small borough located in the state of Pennsylvania. With a population of 2,601 people and two associated neighborhoods, Derry is the 549th largest community in Pennsylvania. Derry has an unusually large stock of pre-World War II architecture, making it one of the older and more historic boroughs.

Derry’s overall crime rate ranks among the lowest in the nation, making it a very safe place to live.

The education level of Derry citizens, measured as those with bachelor's degrees or advanced degrees, is similar to the national average for all American cities and towns. 18.40% of adults 25 and older in Derry have a college degree.

The per capita income in Derry in 2022 was $30,114, which is lower middle income relative to Pennsylvania, and middle income relative to the rest of the US. This equates to an annual income of $120,456 for a family of four. However, Derry contains both very wealthy and poor people as well.

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

The most common language spoken in Derry is English. Other important languages spoken here include Italian and Polish.