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

08550 (Princeton Junction), at $224,213 (±$24,448), among 21 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 Mercer County, NJ

These are the 21 ZIP codes in Mercer County with the highest median household income, out of 21 with at least 1,000 residents. 08550 (Princeton Junction, $224,213), 08540 (Princeton, $176,983) and 08534 (Pennington, $175,573) lead the list. There is no single "best" ZIP code in Mercer 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 Mercer County

Rank	ZIP	Mailing city	Median household income	Residents	Households	Residential mailboxes
1	08550	Princeton Junction	$224,213 ±$24,448	21,067	7,817	7,609
2	08540	Princeton	$176,983 ±$15,327	50,388	18,609	20,795
3	08534	Pennington	$175,573 ±$14,158	13,272	4,995	5,442
4	08525	Hopewell	$165,324 ±$29,804	4,522	1,903	1,946
5	08691	Robbinsville	$132,520 ±$16,995	16,607	6,859	6,843
6	08560	Titusville	$128,516 ±$48,667	3,245	1,333	1,786
7	08690	Trenton	$127,339 ±$12,488	18,841	7,731	8,114
8	08648	Lawrence Township	$125,514 ±$11,405	31,323	12,030	12,715
9	08530	Lambertville	$120,467 ±$19,468	8,119	3,596	3,487
10	08520	Hightstown	$118,010 ±$13,676	29,504	10,974	10,981
11	08628	Trenton	$108,158 ±$20,674	9,831	4,468	5,271
12	08619	Trenton	$105,946 ±$7,166	24,089	9,924	10,011
13	08542	Princeton	$105,524 ±$25,710	2,533	1,264	1,631
14	08620	Trenton	$105,368 ±$8,706	11,621	4,187	4,647
15	08610	Trenton	$83,906 ±$8,336	33,465	12,315	12,123
16	08629	Trenton	$82,646 ±$13,115	13,013	4,296	4,109
17	08609	Trenton	$68,238 ±$6,779	15,938	4,880	5,122
18	08638	Trenton	$66,875 ±$6,861	22,816	9,045	9,709
19	08608	Trenton	$61,201 ±$34,027	1,250	653	780
20	08611	Trenton	$56,788 ±$6,413	31,995	10,716	9,099
21	08618	Trenton	$50,390 ±$5,516	35,634	13,477	14,571

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; 21 of 23 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 40,183 households, on 92 carrier routes with 42,635 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 08550 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

Map it and price it

EDDM guides

Frequently asked questions

Which ZIP code in Mercer County has the highest median household income?: 08550 (Princeton Junction), at $224,213 (±$24,448), among 21 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.