Derry, Pennsylvania

Derry population, 2020 to 2024

Derry lost 57 residents from July 2020 to July 2024, a change of -2.2%. In the latest year it moved by -8.

Derry covers 0.77 square miles of land and 0.02 of water, for 3,355 people per square mile of land. The median Pennsylvania place of 5,000+ has 3,911, so Derry is less dense than the typical town.

What county Derry is in

All of Derry's residents live in Westmoreland County, which had 350,935 residents in 2024. Derry holds 0.7% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Derry

1 ZIP Code Tabulation Area (ZCTA) overlaps Derry by at least 10% of the ZCTA's or the borough's land: 15627. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a borough that annexed land after 2020 may reach into ZIP codes not listed here.

Where Derry is

The Census internal point of Derry is at 40.333400, -79.301100. Harrisburg, the capital, is 127.5 miles E in a straight line. The nearest larger place is Latrobe, PA (7,906 people), 4.5 miles away. The nearest city of 100,000 or more is Pittsburgh, PA, 36.3 miles away.

Daylight in Derry

At 40.33° N, Derry gets about 15 h 03 min of daylight around the June solstice and 9 h 18 min around the December solstice, a swing of 5 h 46 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Derry

The eight nearest incorporated places of 1,000+ in Pennsylvania, measured between internal points. The closest is Latrobe, 4.5 miles away, with 7,906 people.