Twilight is a borough in Washington County, Pennsylvania, United States.

[3] According to the United States Census Bureau, the borough has a total area of 1.6 square miles (4.1 km2), all land.

Twilight has four borders, including Charleroi to the north, Speers to the east and northeast, Long Branch to the south, and Fallowfield Township to the west.

19.8% of all households were made up of individuals, and 10.4% had someone living alone who was 65 years of age or older.

About 7.5% of families and 10.5% of the population were below the poverty line, including 17.1% of those under the age of eighteen and none of those 65 or over.