What city is 06371 in?

06371 is a Old Lyme, CT mailing address. None of its land lies inside a Census-defined city or community.

What is the population of 06371?

About 9,828 people (±338), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 9,840.

What is the median household income in 06371?

$132,045 (±$8,059), compared with $95,781 for Connecticut as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 06371?

9 USPS carrier routes with 5,016 residential and 160 business mailboxes (5,184 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 06371?

The closest, measured center to center: 06426 (3.9 mi, Essex Village), 06333 (5.2 mi), 06475 (5.3 mi, Old Saybrook Center), 06439 (5.4 mi), 06409 (5.6 mi, Essex Village) and 06442 (5.9 mi).

06371 ZIP Code, Old Lyme, CT

06371 is a ZIP code in Old Lyme, Connecticut in New London County. It covers 54 square miles of land. The closest ZIP codes are 06426, 06333 and 06475. 9,828 people live here in 4,122 households. With about 182 people per square mile it is lightly settled, and most homes are owner-occupied (89%). Median household income is $132,045, above the Connecticut median of $95,781; the median age is 52.0, older than most ZIP codes.

Quick facts

Mailing city: Old Lyme, CT
County: New London County
Land area: 54 sq mi
Population: 9,828
Median household income: $132,045
Carrier routes: 9 (5,016 homes)

Key figures

Measure	Value
Residents	9,828
Households	4,122
Median household income	$132,045
Income per person	$85,733
Median age	52
Homeowners	89.1%
Median home value	$499,400
Median rent	$2,172
Bachelor's degree or higher	58.4%
Average commute (minutes)	27.7
Households with kids under 18	28.6%
Moved in the past year	9.2%
Below the poverty line	3.0%
Broadband internet	98.8%
Speak a non-English language at home	7.6%

Household income

% of households	Value
<$10K	1.7%
$10–15K	1.2%
$15–25K	3.0%
$25–35K	1.9%
$35–50K	6.0%
$50–75K	8.6%
$75–100K	12.4%
$100–150K	21.8%
$150–200K	12.1%
$200K+	31.2%

Age

% of all residents	Value
<10	9.2%
10–19	11.2%
20–24	3.7%
25–34	6.3%
35–44	10.8%
45–54	13.8%
55–64	17.7%
65–74	16.9%
75+	10.5%

Tenure

% of housing units	Value
Owned, with mortgage	40.0%
Owned outright	27.1%
Rented	7.8%
Vacant	25.1%

Type of building

% of housing units	Value
Detached house	94.2%
Townhome	0.5%
2–4 units	3.3%
5–19 units	0.3%
20+ units	0.1%
Mobile / other	1.6%

Businesses in 06371

255 business establishments with 1,809 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 46
Construction: 30
Administrative and Support and Waste Management and Remediation Services: 25
Health Care and Social Assistance: 24
Retail Trade: 22
Other Services (except Public Administration): 21
Accommodation and Food Services: 18
Arts, Entertainment, and Recreation: 14

EDDM carrier routes

06371 has 9 USPS carrier routes with 5,016 residential and 160 business mailboxes. Open the EDDM route map.

Carrier routes in 06371

06371 has 9 USPS carrier routes (9 rural (R)) with 5,016 residential and 160 business mailboxes. Routes range from 382 homes (R010) to 828 homes (R007); the median route has 571 homes. The Census counted 4,122 households in 06371 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	3
500–749	5
750–999	1
1,000–1,499	0
1,500+	0

Best routes in 06371 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route R005 — USPS business mailboxes 57, 399 homes
Route R010 — USPS business mailboxes 35, 382 homes
Route R006 — USPS business mailboxes 21, 572 homes
Route R007 — USPS business mailboxes 15, 828 homes
Route R009 — USPS business mailboxes 13, 639 homes

Select these 5 routes on the route map

Every carrier route in 06371

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R001	Rural	558	3	$141,860	—	—	—
R002	Rural	476	5	$103,706	—	—	—
R003	Rural	571	7	$146,620	—	—	—
R004	Rural	591	4	$159,820	—	—	—
R005	Rural	399	57	$111,831	—	—	—
R006	Rural	572	21	$159,820	—	—	—
R007	Rural	828	15	$111,831	—	—	—
R009	Rural	639	13	$135,366	—	—	—
R010	Rural	382	35	$89,697	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 06371 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

06426 — Essex Village CDP, CT (3.9 mi)
06333 (5.2 mi)
06475 — Old Saybrook Center CDP, CT (5.3 mi)
06439 (5.4 mi)
06409 — Essex Village CDP, CT (5.6 mi)
06442 (5.9 mi)
06376 (6 mi)
06357 — Niantic CDP, CT (6.3 mi)

Areas that include 06371

Old Lyme, CT ZIP codes — 1 ZIP code
New London County ZIP codes — 33 ZIP codes
Connecticut ZIP code data

Where it ranks

Mail every home in 06371

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 06371, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 06371 in?: 06371 is a Old Lyme, CT mailing address. None of its land lies inside a Census-defined city or community.
What county is 06371 in?: 06371 is in New London County.
What is the population of 06371?: About 9,828 people (±338), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 9,840.
What is the median household income in 06371?: $132,045 (±$8,059), compared with $95,781 for Connecticut as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 06371?: 9 USPS carrier routes with 5,016 residential and 160 business mailboxes (5,184 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 06371?: The closest, measured center to center: 06426 (3.9 mi, Essex Village), 06333 (5.2 mi), 06475 (5.3 mi, Old Saybrook Center), 06439 (5.4 mi), 06409 (5.6 mi, Essex Village) and 06442 (5.9 mi).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.