Pennsylvania

Distance from Allentown to Philadelphia

Straight-line distance

44.3mi

Allentown, PA and Philadelphia, PA are 44.3 miles (71.3 km) apart in a straight line. From Allentown, the shortest path starts out heading SSE (156°).

kilometers
71.3
nautical miles
38.5
heading from Allentown
156° SSE
heading from Philadelphia
336° NNW
AllentownPhiladelphia

Orange line: great-circle path · ring: midpoint · thin lines: county borders

How far Allentown is from Philadelphia

The great-circle distance between the Census internal points of Allentown and Philadelphia is 44.3 miles, 71.3 km or 38.5 nautical miles. That is the shortest path over the Earth's surface, computed with the haversine formula on a sphere with the mean Earth radius, 6,371.0 km. A course held on one compass bearing (a rhumb line) would be 44.3 miles, practically the same at this range.

Measurements

Miles
44.3
Kilometers
71.3
Nautical miles
38.5
Bearing from Allentown
155.6° SSE
Bearing arriving at Philadelphia
155.9°
Bearing from Philadelphia
335.9° NNW

Halfway between Allentown and Philadelphia

The great-circle midpoint is at 40.301628, -75.305104 (40°18'5.86"N 75°18'18.37"W). The nearest incorporated place of 1,000 or more people is Souderton, PA, with 7,274 residents, 1.1 miles from the midpoint. To find towns near the midpoint of any two places, use the halfway tool.

Time zones and daylight

Both use America/New_York, so there is no time difference. On June 21, Allentown gets 15 h 05 min of daylight and Philadelphia 15 h 01 min; on December 21, 9 h 16 min and 9 h 20 min. Allentown is 0.58° farther north, so it has the longer summer days and the shorter winter ones.

Population compared

Philadelphia has 12.4 times the population of Allentown. From July 2020 to July 2024, Allentown changed by +1.1% and Philadelphia by -1.7%. Both are in Pennsylvania.

  1. 01Allentown, PA127,138 (+1.1%)
  2. 02Philadelphia, PA1,573,916 (-1.7%)
July 1, 2024 population and change since July 2020, Census Vintage 2024.

Questions people ask

How far is Allentown from Philadelphia?

44.3 miles, 71.3 km or 38.5 nautical miles along the great circle between the two Census internal points. Road distance is longer.

Which direction is Philadelphia from Allentown?

SSE. The great-circle path leaves Allentown on a bearing of 155.6° and arrives at Philadelphia on 155.9°. The return trip starts on 335.9°.

What is halfway between Allentown and Philadelphia?

The midpoint is at 40.301628, -75.305104. The nearest incorporated place of 1,000+ is Souderton, PA, 1.1 miles from it.

Is there a time difference between Allentown and Philadelphia?

Both use America/New_York, so there is no time difference.

Which is bigger, Allentown or Philadelphia?

Philadelphia, with 1,573,916 residents in July 2024 against 127,138 for Allentown, 12.4 times as many.

Sources and data as of

Data as of: Census 2024 Gazetteer internal points and Vintage 2024 estimates; time zones from Open-Meteo.

  1. 01Census 2024 Gazetteer, places
  2. 02Census Vintage 2024 subcounty population estimates
  3. 03SunCalc library (Vladimir Agafonkin), algorithms after Jean Meeus
  4. 04IANA time zone database (clock times and daylight saving rules)

How every number is computed: methodology. Spotted a wrong figure? Report an error.