Which ZIP code in St. Louis County has the highest share of households with children?

63025 (Eureka), at 41.0%, among 44 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 St. Louis County, MO

These are the 25 ZIP codes in St. Louis County with the highest share of households with children, out of 44 with at least 1,000 residents. 63025 (Eureka, 41.0%), 63134 (Saint Louis, 37.9%) and 63131 (Saint Louis, 37.2%) lead the list. There is no single "best" ZIP code in St. Louis 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 St. Louis County

Rank	ZIP	Mailing city	Households with children under 18	Residents	Households	Residential mailboxes
1	63025	Eureka	41.0%	19,508	6,911	7,352
2	63134	Saint Louis	37.9%	13,059	4,851	5,287
3	63131	Saint Louis	37.2%	17,935	6,511	6,482
4	63005	Chesterfield	36.0%	19,779	7,134	7,509
5	63040	Wildwood	34.9%	8,526	3,113	3,361
6	63137	Saint Louis	33.9%	19,684	8,104	7,527
7	63122	Saint Louis	33.6%	41,634	16,686	17,610
8	63034	Florissant	33.3%	18,908	6,670	7,124
9	63132	Saint Louis	33.2%	14,283	5,997	6,095
10	63021	Ballwin	32.7%	55,666	22,131	22,762
11	63038	Wildwood	32.3%	7,107	2,499	2,573
12	63044	Bridgeton	31.8%	10,324	4,328	4,254
13	63026	Fenton	31.7%	45,354	17,488	18,439
14	63138	Saint Louis	31.3%	18,233	7,339	7,398
15	63011	Ballwin	31.0%	35,920	14,437	15,228
16	63031	Florissant	30.3%	50,196	19,408	19,166
17	63126	Saint Louis	30.3%	15,452	6,208	6,435
18	63074	Saint Ann	30.1%	15,793	6,976	6,926
19	63136	Saint Louis	29.9%	40,929	17,457	17,760
20	63135	Saint Louis	29.2%	18,381	7,997	8,147
21	63049	High Ridge	28.9%	16,592	6,458	6,906
22	63017	Chesterfield	28.5%	43,243	17,957	18,881
23	63033	Florissant	28.3%	43,056	17,660	17,609
24	63124	Saint Louis	27.6%	10,839	4,832	5,165
25	63119	Saint Louis	27.1%	34,181	14,476	14,485

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; 44 of 46 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 28,520 households, on 74 carrier routes with 29,991 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 63025 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 St. Louis County has the highest share of households with children?: 63025 (Eureka), at 41.0%, among 44 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.