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

63385 (Wentzville), at 40.8%, among 11 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. Charles County, MO

These are the 11 ZIP codes in St. Charles County with the highest share of households with children, out of 11 with at least 1,000 residents. 63385 (Wentzville, 40.8%), 63368 (O Fallon, 38.4%) and 63367 (Lake Saint Louis, 36.5%) lead the list. There is no single "best" ZIP code in St. Charles 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. Charles County

Rank	ZIP	Mailing city	Households with children under 18	Residents	Households	Residential mailboxes
1	63385	Wentzville	40.8%	51,330	18,106	21,803
2	63368	O Fallon	38.4%	46,966	17,271	18,325
3	63367	Lake Saint Louis	36.5%	29,725	11,125	12,642
4	63348	Foristell	35.7%	10,394	3,781	3,253
5	63341	Defiance	35.3%	3,515	1,324	1,558
6	63304	Saint Charles	33.8%	43,195	16,284	17,988
7	63332	Augusta	33.1%	1,651	616	625
8	63366	O Fallon	33.0%	54,769	20,967	21,505
9	63376	Saint Peters	29.4%	74,962	30,034	31,724
10	63301	Saint Charles	26.3%	52,667	21,462	23,411
11	63303	Saint Charles	22.9%	46,089	20,690	21,072

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; 11 of 14 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 51,607 households, on 89 carrier routes with 57,581 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 63385 on the EDDM route map

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Frequently asked questions

Which ZIP code in St. Charles County has the highest share of households with children?: 63385 (Wentzville), at 40.8%, among 11 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.