Which ZIP code in Mercer County has the highest share of households with children?

08550 (Princeton Junction), at 37.7%, among 22 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.

ZIP codes with the most families with kids in Mercer County, NJ

These are the 22 ZIP codes in Mercer County with the highest share of households with children, out of 22 with at least 1,000 residents. 08550 (Princeton Junction, 37.7%), 08609 (Trenton, 37.7%) and 08540 (Princeton, 36.4%) 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.

ZIP codes with the most families with kids in Mercer County

Rank	ZIP	Mailing city	Households with children under 18	Residents	Households	Residential mailboxes
1	08550	Princeton Junction	37.7%	21,067	7,817	7,609
2	08609	Trenton	37.7%	15,938	4,880	5,122
3	08540	Princeton	36.4%	50,388	18,609	20,795
4	08691	Robbinsville	36.0%	16,607	6,859	6,843
5	08534	Pennington	35.4%	13,272	4,995	5,442
6	08611	Trenton	35.1%	31,995	10,716	9,099
7	08610	Trenton	35.0%	33,465	12,315	12,123
8	08520	Hightstown	33.2%	29,504	10,974	10,981
9	08629	Trenton	30.9%	13,013	4,296	4,109
10	08525	Hopewell	30.1%	4,522	1,903	1,946
11	08620	Trenton	27.8%	11,621	4,187	4,647
12	08648	Lawrence Township	26.8%	31,323	12,030	12,715
13	08638	Trenton	26.2%	22,816	9,045	9,709
14	08619	Trenton	26.1%	24,089	9,924	10,011
15	08618	Trenton	25.5%	35,634	13,477	14,571
16	08560	Titusville	24.8%	3,245	1,333	1,786
17	08690	Trenton	23.5%	18,841	7,731	8,114
18	08608	Trenton	18.4%	1,250	653	780
19	08628	Trenton	17.3%	9,831	4,468	5,271
20	08542	Princeton	16.0%	2,533	1,264	1,631
21	08530	Lambertville	15.2%	8,119	3,596	3,487
22	08544	Princeton	0.0%	4,392	12	—

How we ranked them

Ranked by the share of households with one or more people under 18 (ACS Data Profile, 2020–2024). The Census Bureau does not publish a margin of error for this share in our files. ZIP codes need at least 1,000 residents to be ranked; 22 of 23 qualify.

Which of these to mail, and why

Households with children buy tutoring, youth sports, pediatric and family dental care, child care, birthday venues and family dining. EDDM reaches every door on a route, so a higher share means more of your pieces land with families.

The top five ZIP codes on this list hold 43,160 households, on 94 carrier routes with 45,811 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

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Mercer County has the highest share of households with children?: 08550 (Princeton Junction), at 37.7%, among 22 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the share of households with one or more people under 18 (ACS Data Profile, 2020–2024). The Census Bureau does not publish a margin of error for this share in our files.
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.