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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/19951

19951

ZIP 19951 is Harbeson, Delaware, in Sussex County; area code 302; Eastern time.

Type
Standard
Time zone
America/New_York
County
Sussex
Metro area
Seaford, DE
Population
2,245
Coordinates
38.6853, -75.2552
☼ Live from 19951 — Harbeson, DE

Weather right now

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Local time: —

Where 19951 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 19951
  • 🔢 Type 19951 into a pocket calculator and turn it upside down: ISGGI — not quite a word, sorry.
  • ➕ As a number, 19,951 = 71 × 281. Its digits add up to 25, a total 2,242 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100110111101111
  • 🏠 Its numerical neighbours: 19950 (Greenwood, DE, 21 mi away) and 19952 (Harrington, DE, 25 mi away).
  • 🔄 Backwards, 19951 becomes 15991, which is not a ZIP code at all.
  • 👥 12 other ZIP codes are made of exactly the same digits (11599, 11959, 19195, 19519, 59911, 91915, …). The farthest-flung twin is 99511 in Anchorage, AK, 3,429 miles away.
  • 🧭 Farther south than 53% of all ZIP codes, and farther east than 87%.
  • 🎯1,247 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 19951 and you would come out at 38.69°S, 104.74°E — 780 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 52m of daylight. Shortest: 9h 27m.
  • 📏 At 8.9 square miles of land, 19951 is bigger than 26% of ZIP codes — room for about 6.8 Central Parks.
🌙 The sky over 19951 today
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🌋 Shake report
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Source: USGS.

People and housing

Population2,245This ZIP2,245
Households905This ZIP905
Housing units1,010This ZIP1,010
Median age54.1This ZIP54.1Delaware41.6US 38.9
Median household income$95,546This ZIP$95,546Delaware$84,954US $80,734
Median home value$472,400This ZIP$472,400Delaware$352,000US $332,700
Bachelor's degree or higher41.7%This ZIP41.7%
Mean commute26.0 minThis ZIP26.0 min
Population density251.3 / sq miThis ZIP251.3 / sq mi

Business and tax activity

Business establishments53This ZIP53
Employees2,300This ZIP2,300
Annual payroll$83,112,000This ZIP$83,112,000
Tax returns filed1,370This ZIP1,370
Total adjusted gross income$142,488,000This ZIP$142,488,000

Land area

Land area8.93 sq miThis ZIP8.93 sq mi
Water area0.13 sq miThis ZIP0.13 sq mi

ZIP codes near 19951

ZIPCityDistance
19958 Lewes, DE 5.6 mi
19969 Nassau, DE 5.9 mi
19968 Milton, DE 6.9 mi
19966 Millsboro, DE 7.4 mi
19947 Georgetown, DE 8.1 mi
19971 Rehoboth Beach, DE 8.4 mi
19939 Dagsboro, DE 8.4 mi
19941 Ellendale, DE 11.9 mi
19970 Ocean View, DE 12.3 mi
19967 Millville, DE 12.4 mi

Find every ZIP code within 10 miles of 19951 →

Questions about this ZIP code

Where is ZIP code 19951?

19951 is in Harbeson, Delaware, in Sussex County, part of the Seaford, DE micropolitan area. Its published point location is 38.6853, -75.2552.

What county is 19951 in?

19951 lies in Sussex County.

What area code is 19951?

Harbeson uses area code 302, from NANPA's telephone records.

What time zone is 19951 in?

19951 uses America/New_York.

How many people live in 19951?

About 2,245 people live in ZIP code 19951, in 905 households, at 251.3 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 19951?

$95,546 a year, against $84,954 across Delaware.

What ZIP codes are near 19951?

The closest are 19958 (5.6 mi), 19969 (5.9 mi), 19968 (6.9 mi), 19966 (7.4 mi) and 19947 (8.1 mi).

Is 19951 a PO Box ZIP code?

19951 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “19951 ZIP Code — Harbeson, Delaware (Sussex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/19951

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