According to the United States Census Bureau, the borough has a total area of 0.1 square miles (0.26 km2), all land.

South of Newry, the stream known as Poplar Run flows to the east towards the Frankstown Branch of the Juniata River.

Newry's location made it a suitable stop for the railroad and this new influx of visitors stimulated the economy of the town.

During the following century, the town decreased in population and quietly shifted from an urban to a rural center until the 1950s, when migration of Altoonans from the north began to increase the size of Newry and gave it a more suburban character.

Along Patrick Lane, the southmost east-west road in the town, are located a post office, a small apartment building, a furniture store, a used home appliances and furniture store, and St. Patrick's Parish, a Roman Catholic parish, and an elementary school.

To the west, the Puzzletown Road curves to the southwest through a few miles of housing developments and into Puzzletown, where it becomes Knob Run Road, continues south-southwest up the Appalachian Plateau, up the mountain of Blue Knob and reaches the town of the same name.

To the east, the Catfish Road goes through a few miles of sparse farmland, interrupted by a few houses and a monastery, until it intersects Route 36, which leads north to Hollidaysburg and south to Roaring Spring.