Which ZIP code in New London County has the highest median household income?

06355 (Mystic), at $137,425 (±$13,176), among 26 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Richest ZIP codes in New London County, CT

These are the 25 ZIP codes in New London County with the highest median household income, out of 26 with at least 1,000 residents. 06355 (Mystic, $137,425), 06378 (Stonington, $135,714) and 06371 (Old Lyme, $132,045) lead the list. There is no single "best" ZIP code in New London County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Richest ZIP codes in New London County

Rank	ZIP	Mailing city	Median household income	Residents	Households	Residential mailboxes
1	06355	Mystic	$137,425 ±$13,176	12,173	5,364	6,587
2	06378	Stonington	$135,714 ±$22,839	5,555	2,708	2,402
3	06371	Old Lyme	$132,045 ±$8,059	9,828	4,122	5,016
4	06333	East Lyme	$129,083 ±$11,336	7,389	3,004	3,094
5	06359	North Stonington	$123,938 ±$9,792	5,160	2,114	2,151
6	06420	Salem	$123,425 ±$7,461	4,368	1,811	1,795
7	06415	Colchester	$123,256 ±$13,017	16,038	6,604	6,956
8	06335	Gales Ferry	$118,116 ±$27,307	6,307	2,206	2,688
9	06365	Preston	$117,045 ±$26,931	4,807	1,940	1,745
10	06375	Quaker Hill	$111,833 ±$10,635	3,670	1,378	1,517
11	06249	Lebanon	$109,135 ±$19,475	7,116	2,834	2,930
12	06334	Bozrah	$107,969 ±$11,968	2,249	914	1,058
13	06384	Voluntown	$106,518 ±$24,334	2,663	1,137	1,068
14	06339	Ledyard	$106,403 ±$14,606	9,113	3,344	3,412
15	06370	Oakdale	$105,700 ±$9,518	7,327	2,602	2,847
16	06254	North Franklin	$105,000 ±$9,871	2,004	716	776
17	06385	Waterford	$100,484 ±$10,283	15,966	6,755	7,735
18	06330	Baltic	$98,698 ±$15,255	3,327	1,299	923
19	06379	Pawcatuck	$95,066 ±$12,972	9,017	4,125	4,146
20	06357	Niantic	$93,026 ±$14,524	11,332	5,000	6,152
21	06382	Uncasville	$89,635 ±$11,754	10,143	3,673	4,275
22	06351	Jewett City	$82,976 ±$10,303	15,760	6,559	6,335
23	06340	Groton	$81,792 ±$3,662	29,863	12,879	13,177
24	06360	Norwich	$65,539 ±$5,844	37,216	15,880	16,075
25	06380	Taftville	$63,452 ±$14,389	2,757	1,212	1,428

How we ranked them

Ranked by median household income (ACS 5-year estimates, 2020–2024). The Census Bureau caps published medians at $250,000; ZIP codes at the cap are shown as $250,000+ and ordered by population. ZIP codes need at least 1,000 residents to be ranked; 26 of 33 qualify.

Which of these to mail, and why

Higher-income ZIP codes suit offers with a bigger ticket: remodeling, pools, roofing, financial planning, private schools, premium dining. A median describes the middle household, not every door, so the routes inside each ZIP still vary.

The top five ZIP codes on this list hold 17,312 households, on 38 carrier routes with 19,250 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 06355 on the EDDM route map

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in New London County has the highest median household income?: 06355 (Mystic), at $137,425 (±$13,176), among 26 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median household income (ACS 5-year estimates, 2020–2024). The Census Bureau caps published medians at $250,000; ZIP codes at the cap are shown as $250,000+ and ordered by population.
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

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