Castle Shannon is a somewhat small borough located in the state of Pennsylvania. With a population of 8,190 people and three associated neighborhoods, Castle Shannon is the 150th largest community in Pennsylvania.

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

Telecommuters are a relatively large percentage of the workforce: 11.05% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. 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.

Despite being a small borough, Castle Shannon has a lot of people using the subway to get to and from work every day. Most of these people on the subway are using it to get to good jobs in other cities.

The citizens of Castle Shannon are very well educated compared to the average community in the nation: 35.65% of adults in Castle Shannon have a bachelor's degree or even advanced degree.

The per capita income in Castle Shannon in 2018 was $39,137, which is upper middle income relative to Pennsylvania and the nation. This equates to an annual income of $156,548 for a family of four. However, Castle Shannon contains both very wealthy and poor people as well.

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

The most common language spoken in Castle Shannon is English. Other important languages spoken here include Other Indo-European and Chinese.