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

08540 (Princeton), at $176,983 (±$15,327), among 39 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 Middlesex County, NJ

These are the 25 ZIP codes in Middlesex County with the highest median household income, out of 39 with at least 1,000 residents. 08540 (Princeton, $176,983), 08824 (Kendall Park, $174,776) and 08820 (Edison, $171,363) lead the list. There is no single "best" ZIP code in Middlesex 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 Middlesex County

Rank	ZIP	Mailing city	Median household income	Residents	Households	Residential mailboxes
1	08540	Princeton	$176,983 ±$15,327	50,388	18,609	20,795
2	08824	Kendall Park	$174,776 ±$22,468	13,366	4,489	4,416
3	08820	Edison	$171,363 ±$13,073	39,978	13,181	13,536
4	08810	Dayton	$151,902 ±$18,003	7,952	2,641	2,746
5	08840	Metuchen	$146,635 ±$13,370	18,206	6,378	6,986
6	08816	East Brunswick	$143,586 ±$7,158	49,360	16,715	17,984
7	08850	Milltown	$141,601 ±$18,417	8,538	3,149	3,154
8	08536	Plainsboro	$137,607 ±$13,316	20,817	8,353	9,032
9	07064	Port Reading	$133,854 ±$24,175	3,481	1,101	1,449
10	08852	Monmouth Junction	$133,209 ±$10,409	18,062	6,694	7,402
11	07080	South Plainfield	$130,205 ±$8,140	24,411	8,324	8,433
12	08854	Piscataway	$127,806 ±$6,372	61,088	17,600	19,286
13	07747	Matawan	$124,383 ±$7,060	32,330	13,097	13,070
14	07721	Cliffwood	$123,060 ±$19,805	4,277	1,603	1,700
15	07067	Colonia	$122,713 ±$21,938	18,587	6,262	6,606
16	08902	North Brunswick	$121,071 ±$7,582	43,932	15,398	15,791
17	08512	Cranbury	$118,587 ±$12,155	12,928	5,102	5,035
18	08812	Dunellen	$118,316 ±$15,815	14,224	4,730	5,368
19	08863	Fords	$115,861 ±$10,191	12,771	4,744	4,736
20	08817	Edison	$110,808 ±$7,253	49,020	17,411	—
21	08830	Iselin	$109,500 ±$12,970	19,551	6,512	7,014
22	08857	Old Bridge	$109,312 ±$8,716	40,891	15,740	12,965
23	08831	Monroe Township	$109,042 ±$11,268	55,658	24,083	26,224
24	07077	Sewaren	$108,948 ±$16,155	3,248	1,291	970
25	08846	Middlesex	$105,000 ±$12,543	14,645	5,718	5,461

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; 39 of 40 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 45,298 households, on 110 carrier routes with 48,479 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 08540 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 Middlesex County has the highest median household income?: 08540 (Princeton), at $176,983 (±$15,327), among 39 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.