Port Allegany is a borough in McKean County, Pennsylvania, United States. The population was 2,355 at the 2000 census. According to the United States Census Bureau, the borough has a total area of 1.8 square miles (4.7 km2), all of it land. Port Allegany is seated at the foothills of the Appalachian Mountains.
The Port Allegany School District has two schools: the Elementary School (grades K-6) located on Clyde Lynch Drive, and the High School (grades 7-12) located on 20 Oak Street. The Elementary School was built to replace the aging Arnold School (1924) and Liberty School (1938); a time capsule was placed at the construction site by the 4th grade class president (Class of 1988) on January 20, 1981, to be opened in 100 years. It first received students in August 1981.
Nestled in the foothills of the Allegheny Mountains, Port Allegany is a town with tree lined streets. The headwaters of the Allegheny River are located 30 miles east. The Allegheny River provided a means of transport through the community. Historically, Port Allegany was a traveling point in pioneer days when travelers coming overland from the Susquehanna River would continue by boat. Originally, known as Canoe Place, the town’s name was changed to Port Allegany in 1838. Lumber and tanning industries grew as a result of the river and then the railways. In the 1800s natural gas was discovered which led to the expansion of industries including glass firms, chemical plants, cheese factories, machine shops, brick plants, sawmills, planing mills, tanneries and furniture factories. Today, Port Allegany is best known for its glass manufacturing, Pittsburgh Corning Corporation, which is the only producer of glass blocks in the United States, and Saint-Gobain Containers, which is a producer of glass containers.