Pennsylvania to District of Columbia

Distance from Allentown to Washington

Straight-line distance

142.5mi

Allentown, PA and Washington, DC are 142.5 miles (229.3 km) apart in a straight line. From Allentown, the shortest path starts out heading SW (215°).

kilometers
229.3
nautical miles
123.8
heading from Allentown
215° SW
heading from Washington
35° NE
AllentownWashington

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

How far Allentown is from Washington

The great-circle distance between the Census internal points of Allentown and Washington is 142.5 miles, 229.3 km or 123.8 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 142.5 miles, practically the same at this range.

Measurements

Miles
142.5
Kilometers
229.3
Nautical miles
123.8
Bearing from Allentown
215.5° SW
Bearing arriving at Washington
214.5°
Bearing from Washington
34.5° NE

Halfway between Allentown and Washington

The great-circle midpoint is at 39.751437, -76.256881 (39°45'5.17"N 76°15'24.77"W). The nearest incorporated place of 1,000 or more people is Rising Sun, MD, with 2,777 residents, 11.0 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 Washington 14 h 54 min; on December 21, 9 h 16 min and 9 h 26 min. Allentown is 1.69° farther north, so it has the longer summer days and the shorter winter ones.

Population compared

Washington has 5.5 times the population of Allentown. From July 2020 to July 2024, Allentown changed by +1.1% and Washington by +4.7%. The trip crosses from Pennsylvania into District of Columbia.

  1. 01Allentown, PA127,138 (+1.1%)
  2. 02Washington, DC702,250 (+4.7%)
July 1, 2024 population and change since July 2020, Census Vintage 2024.

Questions people ask

How far is Allentown from Washington?

142.5 miles, 229.3 km or 123.8 nautical miles along the great circle between the two Census internal points. Road distance is longer.

Which direction is Washington from Allentown?

SW. The great-circle path leaves Allentown on a bearing of 215.5° and arrives at Washington on 214.5°. The return trip starts on 34.5°.

What is halfway between Allentown and Washington?

The midpoint is at 39.751437, -76.256881. The nearest incorporated place of 1,000+ is Rising Sun, MD, 11.0 miles from it.

Is there a time difference between Allentown and Washington?

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

Which is bigger, Allentown or Washington?

Washington, with 702,250 residents in July 2024 against 127,138 for Allentown, 5.5 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.