PlainZIP

Killingworth, CT

Single-footprint Census roll-up for Killingworth, CT: 1 USPS ZIP, population 6,525. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet KILLINGWORTH-CT · Killingworth, CT 1 ZIPs · 6,525 pop · #1138/25278 · Middlesex County

INC-TOP · RANK-TOP · ABOVE-PEER · BOOK-ONE · OWN-HIGH · POP-TOWN · SPREAD-UNK · HOME-HIGH

  • INC-TOP $140,655
  • RANK-TOP #1138/25278
  • ABOVE-PEER over Clinton
  • BOOK-ONE 1 ZIP
  • OWN-HIGH 97% owners
  • POP-TOWN 6,525
  • SPREAD-UNK Single-ZIP book
  • HOME-HIGH $446,200

Nearest income peer: Clinton, CT ( $15,831 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Killingworth

Lowest/highest poles plus county-sharing cities nearest Killingworth on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Killingworth, CT sits among US cities with a top-decile household income, on a town-scale population base, across a single-ZIP footprint.

Top 5%
household income vs 25,278 US cities
6,525
city population (Census)
1
USPS ZIP codes covered
$140,655
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

High-income footprint on only 1 ZIP: the city page and the ZIP page nearly coincide. Headline income $140,655 and home value $446,200 should be read as near-neighborhood numbers ; bachelor's attainment averages 55.4%.

Owner-occupancy here runs high (96.7%) - tenure is stable enough that the ZIP detail's owner share is the right next click, not a renter-heavy compare.

Within Connecticut, Marion is the closest lower-income city and Farmington the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Killingworth.

Population concentration

Killingworth's single ZIP 06419 carries the town

Killingworth is published as a single USPS ZIP. Code 06419 is the entire residential footprint (6,525 ACS residents), so the city page and the ZIP page tell the same household story, open that ZIP for income, tenure, and commute detail.

Census ZBP business roll-up

Mid-pack ZBP load on Killingworth's one ZIP

Citywide ZBP: 119 establishments, 722 employees , annual payroll $39,342k (~18 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 06419 (119 units) ; leading NAICS Professional, scientific, and technical services (23) · also Construction · Administrative and support and waste management and remediation services .

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ZIP Codes in Killingworth, CT

These ZIP codes sit in Middlesex County, which covers 22 ZIP codes in all; 1 of them fall in Killingworth. See the Middlesex County roll-up →

Killingworth sits in the upper half of Middlesex County on income: Middletown, Cromwell and Clinton report less, while Durham reports more. Middletown marks the far end of that range at $79,463, 44% below Killingworth.

ZIP Code Population Median income Establishments Density
06419 6,525 $140,655 119 71
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Killingworth roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Killingworth, .