PlainZIP

Groton, CT

Single-footprint Census roll-up for Groton, CT: 1 USPS ZIP, population 31,242. 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 GROTON-CT · Groton, CT 1 ZIPs · 31,242 pop · #8674/25278 · New London County

INC-HIGH · RANK-UPPER · PHOTO-FINISH · BOOK-ONE · OWN-LOW · POP-SMALL · SPREAD-UNK · HOME-MID

  • INC-HIGH $81,792
  • RANK-UPPER #8674/25278
  • PHOTO-FINISH ≈ Jewett City
  • BOOK-ONE 1 ZIP
  • OWN-LOW 45% owners
  • POP-SMALL 31,242
  • SPREAD-UNK Single-ZIP book
  • HOME-MID $294,700

Nearest income peer: Jewett City, CT (+ $1,184 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 Groton

Lowest/highest poles plus county-sharing cities nearest Groton 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, Groton, CT sits among US cities with an above-median household income, on a small-city population base, across a single-ZIP footprint.

Top 34%
household income vs 25,278 US cities
31,242
city population (Census)
1
USPS ZIP codes covered
$81,792
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.

Above-median income on a short ZIP list (1) - lead code 06340 (31,242 residents). Household income $81,792 is the roll-up; open the ZIP for tenure and commute.

Owner-occupancy is comparatively low (44.5%) for this income tier, rent $1,599 may matter more than the home-value average.

Within Connecticut, Northfield is the closest lower-income city and Jewett City the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Groton.

Population concentration

Groton's single ZIP 06340 carries the town

Groton is published as a single USPS ZIP. Code 06340 is the entire residential footprint (31,242 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 Groton's one ZIP

Citywide ZBP: 604 establishments, 22,442 employees , annual payroll $2,096,855k (~19 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 06340 (604 units) ; leading NAICS Accommodation and food services (99) · also Retail trade · Other services (except public administration) .

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ZIP Codes in Groton, CT

These ZIP codes sit in New London County, which covers 31 ZIP codes in all; 1 of them fall in Groton. See the New London County roll-up →

Groton sits in the lower half of New London County on income: Colchester, Waterford and Mystic report more, Norwich and New London report less. Mystic marks the far end of that range at $137,425, 68% above Groton.

ZIP Code Population Median income Establishments Density
06340 31,242 $81,792 604 527
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Groton 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 Groton, .