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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/06419

06419

ZIP 06419 is Killingworth, Connecticut, in Middlesex County; area codes 860 and 959; Eastern time.

Type
Standard
Time zone
America/New_York
County
Middlesex
Metro area
none
Population
6,240
Coordinates
41.3744, -72.5783
☼ Live from 06419 — Killingworth, CT

Weather right now

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Local time: —

Where 06419 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 06419
  • 🔢 Type 06419 into a pocket calculator and turn it upside down: GIhgO — not quite a word, sorry.
  • ➕ As a number, 6,419 = 7 × 7 × 131. Its digits add up to 20, a total 2,586 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100100010011
  • 🏠 Its numerical neighbours: 06418 (Derby, CT, 26 mi away) and 06420 (Salem, CT, 18 mi away).
  • 🔄 Backwards, 06419 becomes 91460, which is not a ZIP code at all.
  • 👥 55 other ZIP codes are made of exactly the same digits (01469, 04619, 04691, 04961, 06491, 06914, …). The farthest-flung twin is 96410 in APO AA, a military post office, 8,442 miles away.
  • 🧭 Farther north than 70% of all ZIP codes, and farther east than 94%.
  • 🎯1,363 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 06419 and you would come out at 41.37°S, 107.42°E — 801 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 10m of daylight. Shortest: 9h 11m.
  • 📏 At 35.3 square miles of land, 06419 is bigger than 50% of ZIP codes — room for about 27 Central Parks.
🌙 The sky over 06419 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population6,240This ZIP6,240
Households2,516This ZIP2,516
Housing units2,775This ZIP2,775
Median age53.3This ZIP53.3Connecticut41.1US 38.9
Median household income$140,655This ZIP$140,655Connecticut$95,781US $80,734
Median home value$446,200This ZIP$446,200Connecticut$366,900US $332,700
Bachelor's degree or higher55.4%This ZIP55.4%
Mean commute23.9 minThis ZIP23.9 min
Population density176.6 / sq miThis ZIP176.6 / sq mi

Business and tax activity

Business establishments119This ZIP119
Employees722This ZIP722
Annual payroll$39,342,000This ZIP$39,342,000
Tax returns filed3,310This ZIP3,310
Total adjusted gross income$431,163,000This ZIP$431,163,000

Land area

Land area35.33 sq miThis ZIP35.33 sq mi
Water area0.45 sq miThis ZIP0.45 sq mi

ZIP codes near 06419

ZIPCityDistance
06443 Madison, CT 3.2 mi
06417 Deep River, CT 5.3 mi
06412 Chester, CT 5.4 mi
06413 Clinton, CT 6.0 mi
06441 Higganum, CT 6.3 mi
06438 Haddam, CT 6.4 mi
06437 Guilford, CT 6.8 mi
06498 Westbrook, CT 7.1 mi
06442 Ivoryton, CT 7.8 mi
06409 Centerbrook, CT 7.9 mi

Find every ZIP code within 10 miles of 06419 →

Questions about this ZIP code

Where is ZIP code 06419?

06419 is in Killingworth, Connecticut, in Middlesex County. Its published point location is 41.3744, -72.5783.

What county is 06419 in?

06419 lies in Middlesex County.

What area code is 06419?

Killingworth uses area codes 860 and 959, from NANPA's telephone records.

What time zone is 06419 in?

06419 uses America/New_York.

How many people live in 06419?

About 6,240 people live in ZIP code 06419, in 2,516 households, at 176.6 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 06419?

$140,655 a year, against $95,781 across Connecticut.

What ZIP codes are near 06419?

The closest are 06443 (3.2 mi), 06417 (5.3 mi), 06412 (5.4 mi), 06413 (6 mi) and 06441 (6.3 mi).

Is 06419 a PO Box ZIP code?

06419 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “06419 ZIP Code — Killingworth, Connecticut (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/06419

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