McSherrystown is a borough in Adams County, Pennsylvania, United States.

Its founder, Patrick McSherry (1725–1795), who had family origins stemming from Newry in the south-east of Ulster in the north of Ireland, procured a 300-acre (1.2 km2) tract from the Digges Family in 1763 and proceeded to lay out a number of 5-acre (20,000 m2) lots.

Although McSherry may have intended his effort to be used primarily as outlots for Hanover residents, where they could keep their animals at times and obtain wood, it soon developed into a full-fledged town.

[4] According to the United States Census Bureau, the borough has a total area of 0.5 square miles (1.3 km2), all land.

There were 1,231 housing units at an average density of 2,350.7 per square mile (907.6/km2).

32.0% of all households were made up of individuals, and 15.4% had someone living alone who was 65 years of age or older.