Allentown, Pennsylvania

Allentown population, 2020 to 2024

Allentown added 1,407 residents from July 2020 to July 2024, a change of +1.1%. In the latest year it moved by +1,219. Among 193 Pennsylvania places of 5,000 or more, that growth ranks 59th; the median place changed by +0.2%. The median place of 5,000+ in Pennsylvania has 8,364 people, so Allentown is 15.2 times that size.

Allentown covers 17.56 square miles of land and 0.44 of water, for 7,240 people per square mile of land. The median Pennsylvania place of 5,000+ has 3,911, so Allentown is denser than the typical town.

What county Allentown is in

All of Allentown's residents live in Lehigh County, which had 385,655 residents in 2024. Allentown holds 33.0% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Allentown

5 ZIP Code Tabulation Areas (ZCTAs) overlap Allentown by at least 10% of the ZCTA's or the city's land: 18101, 18102, 18103, 18104, 18109. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Allentown is

The Census internal point of Allentown is at 40.593600, -75.478400. Harrisburg, the capital, is 77.4 miles WSW in a straight line. The nearest larger place is Philadelphia, PA (1,573,916 people), 44.2 miles away. The ground at the internal point is about 84 m (276 ft) above sea level.

Daylight in Allentown

At 40.59° N, Allentown gets about 15 h 05 min of daylight around the June solstice and 9 h 16 min around the December solstice, a swing of 5 h 49 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026. Month-by-month sunrise and sunset times are on the Allentown daylight page.

Places near Allentown

The eight nearest incorporated places of 1,000+ in Pennsylvania, measured between internal points. The closest is Emmaus, 4.2 miles away, with 12,314 people.