Mifflinburg is a very small borough located in the state of Pennsylvania. With a population of 3,470 people and two associated neighborhoods, Mifflinburg is the 434th largest community in Pennsylvania.

Mifflinburg is a small borough, and as such doesn't have a public transit system that people use to get to and from their jobs every day.

The education level of Mifflinburg citizens is substantially higher than the typical US community, as 31.52% of adults in Mifflinburg have at least a bachelor's degree.

The per capita income in Mifflinburg in 2022 was $31,857, which is lower middle income relative to Pennsylvania and the nation. This equates to an annual income of $127,428 for a family of four. However, Mifflinburg contains both very wealthy and poor people as well.

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

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