Which ZIP code in St. Charles County has the highest share of residents who moved in during the past year?

63303 (Saint Charles), at 13.6%, 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 new movers in St. Charles County, MO

These are the 11 ZIP codes in St. Charles County with the highest share of residents who moved in during the past year, out of 11 with at least 1,000 residents. 63303 (Saint Charles, 13.6%), 63301 (Saint Charles, 13.3%) and 63367 (Lake Saint Louis, 13.2%) 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 new movers in St. Charles County

Rank	ZIP	Mailing city	Moved in the past year	Residents	Households	Residential mailboxes
1	63303	Saint Charles	13.6%	46,089	20,690	21,072
2	63301	Saint Charles	13.3%	52,667	21,462	23,411
3	63367	Lake Saint Louis	13.2%	29,725	11,125	12,642
4	63348	Foristell	11.0%	10,394	3,781	3,253
5	63368	O Fallon	10.5%	46,966	17,271	18,325
6	63385	Wentzville	9.9%	51,330	18,106	21,803
7	63366	O Fallon	8.8%	54,769	20,967	21,505
8	63376	Saint Peters	8.4%	74,962	30,034	31,724
9	63304	Saint Charles	8.1%	43,195	16,284	17,988
10	63341	Defiance	5.5%	3,515	1,324	1,558
11	63332	Augusta	1.5%	1,651	616	625

How we ranked them

Ranked by the share of residents (age 1 and over) who lived in a different home a year earlier (ACS Data Profile, 2020–2024). No margin of error is published 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

New residents are still choosing a dentist, a gym, a pizza place and a lawn service. ZIP codes with high turnover give a welcome offer more people to work on each year.

The top five ZIP codes on this list hold 74,329 households, on 126 carrier routes with 78,703 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 63303 on the EDDM route map

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Frequently asked questions

Which ZIP code in St. Charles County has the highest share of residents who moved in during the past year?: 63303 (Saint Charles), at 13.6%, among 11 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the share of residents (age 1 and over) who lived in a different home a year earlier (ACS Data Profile, 2020–2024). No margin of error is published 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.