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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/17320

17320

ZIP 17320 is Fairfield, Pennsylvania, in Adams County; area codes 717 and 223; Eastern time.

Type
Standard
Time zone
America/New_York
County
Adams
Metro area
Gettysburg, PA
Population
8,124
Coordinates
39.7702, -77.3876
☼ Live from 17320 — Fairfield, PA

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Where 17320 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 17320
  • 🔢 Type 17320 into a pocket calculator and turn it upside down: OZELI — not quite a word, sorry.
  • ➕ As a number, 17,320 = 2 × 2 × 2 × 5 × 433. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100001110101000
  • 🏠 Its numerical neighbours: 17319 (Etters, PA, 41 mi away) and 17321 (Fawn Grove, PA, 50 mi away).
  • 🔄 Backwards, 17320 becomes 02371, which is not a ZIP code at all.
  • 👥 63 other ZIP codes are made of exactly the same digits (01237, 02137, 02713, 03217, 10273, 12037, …). The farthest-flung twin is 73021 in Colony, OK, 1,202 miles away.
  • 🧭 Farther north than 54% of all ZIP codes, and farther east than 80%.
  • 🎯1,122 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 17320 and you would come out at 39.77°S, 102.61°E — 916 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 59m of daylight. Shortest: 9h 21m.
  • 📏 At 57.0 square miles of land, 17320 is bigger than 63% of ZIP codes — room for about 43 Central Parks.
🌙 The sky over 17320 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population8,124This ZIP8,124
Households3,190This ZIP3,190
Housing units3,386This ZIP3,386
Median age43.7This ZIP43.7Pennsylvania40.9US 38.9
Median household income$90,076This ZIP$90,076Pennsylvania$77,971US $80,734
Median home value$295,000This ZIP$295,000Pennsylvania$254,500US $332,700
Median gross rent$1,200This ZIP$1,200Pennsylvania$1,209US $1,413
Bachelor's degree or higher26.9%This ZIP26.9%
Mean commute37.6 minThis ZIP37.6 min
Population density142.5 / sq miThis ZIP142.5 / sq mi

Business and tax activity

Business establishments105This ZIP105
Employees1,593This ZIP1,593
Annual payroll$51,311,000This ZIP$51,311,000
Tax returns filed4,210This ZIP4,210
Total adjusted gross income$392,945,000This ZIP$392,945,000

Land area

Land area57.01 sq miThis ZIP57.01 sq mi
Water area0.16 sq miThis ZIP0.16 sq mi

Other place names in 17320

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 17320

ZIPCityDistance
17214 Blue Ridge Summit, PA 4.7 mi
21727 Emmitsburg, MD 6.4 mi
17343 Mc Knightstown, PA 7.5 mi
21719 Cascade, MD 7.5 mi
17250 Rouzerville, PA 7.6 mi
17353 Orrtanna, PA 8.1 mi
21780 Sabillasville, MD 8.1 mi
17310 Cashtown, PA 8.5 mi
17261 South Mountain, PA 9.0 mi
17325 Gettysburg, PA 9.3 mi

Find every ZIP code within 10 miles of 17320 →

Questions about this ZIP code

Where is ZIP code 17320?

17320 is in Fairfield, Pennsylvania, in Adams County, part of the Gettysburg, PA metropolitan area. Its published point location is 39.7702, -77.3876.

What county is 17320 in?

17320 lies in Adams County.

What area code is 17320?

Fairfield uses area codes 717 and 223, from NANPA's telephone records.

What time zone is 17320 in?

17320 uses America/New_York.

How many people live in 17320?

About 8,124 people live in ZIP code 17320, in 3,190 households, at 142.5 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 17320?

$90,076 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 17320?

The closest are 17214 (4.7 mi), 21727 (6.4 mi), 17343 (7.5 mi), 21719 (7.5 mi) and 17250 (7.6 mi).

Is 17320 a PO Box ZIP code?

17320 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “17320 ZIP Code — Fairfield, Pennsylvania (Adams County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/17320

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