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Where 19311 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.
- 🔢 Type 19311 into a pocket calculator and turn it upside down: IIEGI — not quite a word, sorry.
- ➕ As a number, 19,311 = 3 × 41 × 157. Its digits add up to 15, a total 1,657 other ZIP codes share.
- 💾In binary, the way a computer stores it:
100101101101111 - 🏠 Its numerical neighbours: 19310 (Atglen, PA, 13 mi away) and 19312 (Berwyn, PA, 22 mi away).
- 🔄 Backwards, 19311 becomes 11391, which is not a ZIP code at all.
- 👥 8 other ZIP codes are made of exactly the same digits (11931, 13119, 19113, 19131, 31119, 39111, …). The farthest-flung twin is 93111 in Santa Barbara, CA, 2,429 miles away.
- 🧭 Farther north than 55% of all ZIP codes, and farther east than 85%.
- 🎯1,207 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 19311 and you would come out at 39.82°S, 104.23°E — 847 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 00m of daylight. Shortest: 9h 21m.
- 📏 At 12.5 square miles of land, 19311 is bigger than 30% of ZIP codes — room for about 9.5 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 11,692This ZIP11,692 |
|---|---|
| Households | 3,619This ZIP3,619 |
| Housing units | 3,706This ZIP3,706 |
| Median age | 35.8This ZIP35.8Pennsylvania40.9US 38.9 |
| Median household income | $155,771This ZIP$155,771Pennsylvania$77,971US $80,734 |
| Median home value | $540,800This ZIP$540,800Pennsylvania$254,500US $332,700 |
| Median gross rent | $1,483This ZIP$1,483Pennsylvania$1,209US $1,413 |
| Bachelor's degree or higher | 57.5%This ZIP57.5% |
| Mean commute | 25.6 minThis ZIP25.6 min |
| Population density | 931.8 / sq miThis ZIP931.8 / sq mi |
Business and tax activity
| Business establishments | 178This ZIP178 |
|---|---|
| Employees | 2,891This ZIP2,891 |
| Annual payroll | $129,747,000This ZIP$129,747,000 |
| Tax returns filed | 4,250This ZIP4,250 |
| Total adjusted gross income | $565,444,000This ZIP$565,444,000 |
Land area
| Land area | 12.55 sq miThis ZIP12.55 sq mi |
|---|---|
| Water area | 0.09 sq miThis ZIP0.09 sq mi |
Other place names in 19311
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 19311
| ZIP | City | Distance |
|---|---|---|
19374 | Toughkenamon, PA | 1.2 mi |
19318 | Chatham, PA | 3.0 mi |
19390 | West Grove, PA | 3.9 mi |
19348 | Kennett Square, PA | 4.1 mi |
19350 | Landenberg, PA | 4.4 mi |
19707 | Hockessin, DE | 5.3 mi |
19347 | Kemblesville, PA | 5.7 mi |
19346 | Kelton, PA | 5.7 mi |
19375 | Unionville, PA | 5.8 mi |
19360 | New London, PA | 6.6 mi |
Find every ZIP code within 10 miles of 19311 →
Questions about this ZIP code
Where is ZIP code 19311?
19311 is in Avondale, Pennsylvania, in Chester County, part of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metropolitan area. Its published point location is 39.8211, -75.7713.
What county is 19311 in?
19311 lies in Chester County.
What area code is 19311?
Avondale uses area codes 484, 610 and 835, from NANPA's telephone records.
What time zone is 19311 in?
19311 uses America/New_York.
How many people live in 19311?
About 11,692 people live in ZIP code 19311, in 3,619 households, at 931.8 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 19311?
$155,771 a year, against $77,971 across Pennsylvania.
What ZIP codes are near 19311?
The closest are 19374 (1.2 mi), 19318 (3 mi), 19390 (3.9 mi), 19348 (4.1 mi) and 19350 (4.4 mi).
Is 19311 a PO Box ZIP code?
19311 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “19311 ZIP Code — Avondale, Pennsylvania (Chester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/19311
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/19311.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.