West Mifflin is a medium-sized borough located in the state of Pennsylvania. With a population of 19,140 people and six associated neighborhoods, West Mifflin is the 44th largest community in Pennsylvania.

Also of interest is that West Mifflin 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: 8.37% 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.

Even though West Mifflin is a smaller borough, it has many people who hop on public transportation – mostly the bus for their daily commute to work. Typically, these people are commuting to good jobs in the surrounding cities.

The citizens of West Mifflin are slightly better educated than the national average of 21.84% for all cities and towns, with 22.55% of adults in West Mifflin having a bachelor's degree or advanced degree.

The per capita income in West Mifflin in 2022 was $33,952, which is middle income relative to Pennsylvania and the nation. This equates to an annual income of $135,808 for a family of four. However, West Mifflin contains both very wealthy and poor people as well.

West Mifflin is a somewhat ethnically-diverse borough. The people who call West Mifflin home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of West Mifflin residents report their race to be White, followed by Black or African-American. Important ancestries of people in West Mifflin include Irish, German, Italian, Slovak, and Polish.

The most common language spoken in West Mifflin is English. Other important languages spoken here include Spanish and Italian.