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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/19121

19121

ZIP 19121 is in Philadelphia, Pennsylvania, in Philadelphia County; area codes 215, 267 and 445; Eastern time. Philadelphia has 87 ZIP codes in all.

Type
Standard
Time zone
America/New_York
County
Philadelphia
Population
41,574
Coordinates
39.9821, -75.1798
☼ Live from 19121 — Philadelphia, PA

Weather right now

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Local time: —

Where 19121 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 19121
  • 🔢 Type 19121 into a pocket calculator and turn it upside down: IZIGI — not quite a word, sorry.
  • ➕ 19121 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100101010110001
  • 🏠 Its numerical neighbours: 19120 (Philadelphia, PA, 5 mi away) and 19122 (Philadelphia, PA, 2 mi away).
  • 🔄 Backwards, 19121 becomes 12191, which is not a ZIP code at all.
  • 👥 7 other ZIP codes are made of exactly the same digits (11219, 12911, 19112, 21911, 29111, 91121, …). The farthest-flung twin is 91121 in Pasadena, CA, 2,380 miles away.
  • 🧭 Farther north than 56% of all ZIP codes, and farther east than 87%.
  • 🎯1,237 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 19121 and you would come out at 39.98°S, 104.82°E — 829 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 01m of daylight. Shortest: 9h 20m.
  • 📏 At 2.4 square miles of land, 19121 is bigger than 13% of ZIP codes — room for about 1.8 Central Parks.
🌙 The sky over 19121 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population41,574This ZIP41,574
Households18,045This ZIP18,045
Housing units20,858This ZIP20,858
Median age27.4This ZIP27.4Pennsylvania40.9US 38.9
Median household income$38,516This ZIP$38,516Pennsylvania$77,971US $80,734
Median home value$266,700This ZIP$266,700Pennsylvania$254,500US $332,700
Median gross rent$1,187This ZIP$1,187Pennsylvania$1,209US $1,413
Bachelor's degree or higher28.1%This ZIP28.1%
Mean commute29.4 minThis ZIP29.4 min
Population density17,564.0 / sq miThis ZIP17,564.0 / sq mi

Business and tax activity

Business establishments345This ZIP345
Employees3,106This ZIP3,106
Annual payroll$135,791,000This ZIP$135,791,000
Tax returns filed14,200This ZIP14,200
Total adjusted gross income$616,168,000This ZIP$616,168,000

Land area

Land area2.37 sq miThis ZIP2.37 sq mi
Water area0.17 sq miThis ZIP0.17 sq mi

Other place names in 19121

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

ZIP codes near 19121

ZIPCityDistance
19130 Philadelphia, PA 1.0 mi
19132 Philadelphia, PA 1.1 mi
19122 Philadelphia, PA 1.8 mi
19108 Philadelphia, PA 1.8 mi
19104 Philadelphia, PA 1.9 mi
19103 Philadelphia, PA 2.0 mi
19131 Philadelphia, PA 2.1 mi
19102 Philadelphia, PA 2.1 mi
19129 Philadelphia, PA 2.2 mi
19133 Philadelphia, PA 2.2 mi

Find every ZIP code within 10 miles of 19121 →

Questions about this ZIP code

Where is ZIP code 19121?

19121 is in Philadelphia, Pennsylvania, in Philadelphia County, part of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metropolitan area. Its published point location is 39.9821, -75.1798.

What county is 19121 in?

19121 lies in Philadelphia County.

What area code is 19121?

Philadelphia uses area codes 215, 267 and 445, from NANPA's telephone records.

What time zone is 19121 in?

19121 uses America/New_York.

How many people live in 19121?

About 41,574 people live in ZIP code 19121, in 18,045 households, at 17,564.0 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 19121?

$38,516 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 19121?

The closest are 19130 (1 mi), 19132 (1.1 mi), 19122 (1.8 mi), 19108 (1.8 mi) and 19104 (1.9 mi).

Is 19121 a PO Box ZIP code?

19121 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “19121 ZIP Code — Philadelphia, Pennsylvania (Philadelphia County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/19121

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