Which ZIP code in St. Charles County has the highest median home value?

63341 (Defiance), at $606,800 (±$64,706), 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 highest home values in St. Charles County, MO

These are the 11 ZIP codes in St. Charles County with the highest median home value, out of 11 with at least 1,000 residents. 63341 (Defiance, $606,800), 63367 (Lake Saint Louis, $409,100) and 63348 (Foristell, $386,200) 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 highest home values in St. Charles County

Rank	ZIP	Mailing city	Median home value	Residents	Households	Residential mailboxes
1	63341	Defiance	$606,800 ±$64,706	3,515	1,324	1,558
2	63367	Lake Saint Louis	$409,100 ±$15,422	29,725	11,125	12,642
3	63348	Foristell	$386,200 ±$18,146	10,394	3,781	3,253
4	63332	Augusta	$385,400 ±$56,867	1,651	616	625
5	63304	Saint Charles	$351,000 ±$9,043	43,195	16,284	17,988
6	63368	O Fallon	$349,200 ±$7,995	46,966	17,271	18,325
7	63385	Wentzville	$347,200 ±$8,758	51,330	18,106	21,803
8	63303	Saint Charles	$321,100 ±$9,307	46,089	20,690	21,072
9	63366	O Fallon	$304,500 ±$10,895	54,769	20,967	21,505
10	63376	Saint Peters	$275,400 ±$5,618	74,962	30,034	31,724
11	63301	Saint Charles	$267,600 ±$8,565	52,667	21,462	23,411

How we ranked them

Ranked by median value of owner-occupied homes as reported by owners (ACS 5-year estimates, 2020–2024). Published medians are capped at $2,000,000. ZIP codes need at least 1,000 residents to be ranked; 11 of 14 qualify.

Which of these to mail, and why

Home value tracks what owners spend on the house itself: renovations, landscaping, pest control, security, interior design. Pair it with the homeowner share so the mailer reaches owners, not tenants.

The top five ZIP codes on this list hold 33,130 households, on 60 carrier routes with 36,066 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 63341 on the EDDM route map

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Frequently asked questions

Which ZIP code in St. Charles County has the highest median home value?: 63341 (Defiance), at $606,800 (±$64,706), among 11 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median value of owner-occupied homes as reported by owners (ACS 5-year estimates, 2020–2024). Published medians are capped at $2,000,000.
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.