Brownsville is a very small borough located in the state of Pennsylvania. With a population of 2,136 people and two associated neighborhoods, Brownsville is the 614th largest community in Pennsylvania. Brownsville has an unusually large stock of pre-World War II architecture, making it one of the older and more historic boroughs.

In Brownsville, just 10.22% of people have at least a bachelor's degree, which is quite a bit lower than the national average for cities and towns of 21.84%.

The per capita income in Brownsville in 2022 was $26,524, which is low income relative to Pennsylvania, and lower middle income relative to the rest of the US. This equates to an annual income of $106,096 for a family of four. However, Brownsville contains both very wealthy and poor people as well. Brownsville also has one of the higher rates of people living in poverty in the nation, with 31.70% of its population below the federal poverty line.

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

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