What city is 63367 in?

63367 is a Lake Saint Louis, MO mailing address. By land area, 65% lies inside Lake St. Louis, 13% lies inside O'Fallon and 2% lies inside Wentzville; the rest is outside any Census-defined city or community.

What county is 63367 in?

63367 is in St. Charles County.

What is the population of 63367?

About 29,725 people (±993), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 27,009.

What is the median household income in 63367?

$137,648 (±$11,081), compared with $70,702 for Missouri as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 63367?

20 USPS carrier routes with 12,642 residential and 508 business mailboxes (13,150 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 63367?

The closest, measured center to center: 63385 (3.7 mi, Wentzville), 63368 (3.9 mi, O'Fallon), 63365 (6.1 mi, New Melle), 63366 (6.9 mi, O'Fallon), 63304 (7.5 mi, Weldon Spring) and 63341 (7.9 mi, Defiance).

63367 ZIP Code, Lake Saint Louis, MO

63367 is a ZIP code in Lake Saint Louis, Missouri in St. Charles County. It covers 13 square miles of land. The closest ZIP codes are 63385, 63368 and 63365. 29,725 people live here in 11,125 households, more than in 9 of every 10 Missouri ZIP codes. At about 2,295 people per square mile it has suburban density, and most homes are owner-occupied (82%). Median household income is $137,648, well above the Missouri median of $70,702.

Quick facts

Mailing city: Lake Saint Louis, MO
County: St. Charles County
Land area: 13 sq mi
Population: 29,725
Median household income: $137,648
Carrier routes: 20 (12,642 homes)

Key figures

Measure	Value
Residents	29,725
Households	11,125
Median household income	$137,648
Income per person	$59,320
Median age	39.5
Homeowners	81.5%
Median home value	$409,100
Median rent	$1,634
Bachelor's degree or higher	52.0%
Average commute (minutes)	26.1
Households with kids under 18	36.5%
Moved in the past year	13.2%
Below the poverty line	3.2%
Broadband internet	98.4%
Speak a non-English language at home	5.2%

Household income

% of households	Value
<$10K	2.9%
$10–15K	0.4%
$15–25K	1.7%
$25–35K	1.3%
$35–50K	7.2%
$50–75K	12.9%
$75–100K	7.3%
$100–150K	23.7%
$150–200K	17.0%
$200K+	25.7%

Age

% of all residents	Value
<10	12.3%
10–19	14.5%
20–24	6.2%
25–34	9.7%
35–44	16.5%
45–54	13.4%
55–64	11.5%
65–74	8.8%
75+	7.2%

Tenure

% of housing units	Value
Owned, with mortgage	61.4%
Owned outright	17.1%
Rented	17.6%
Vacant	3.9%

Type of building

% of housing units	Value
Detached house	74.5%
Townhome	10.1%
2–4 units	2.4%
5–19 units	8.8%
20+ units	4.2%
Mobile / other	0.0%

Businesses in 63367

527 business establishments with 7,520 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 75
Retail Trade: 69
Accommodation and Food Services: 55
Professional, Scientific, and Technical Services: 54
Construction: 50
Other Services (except Public Administration): 45
Finance and Insurance: 42
Wholesale Trade: 34

EDDM carrier routes

63367 has 20 USPS carrier routes with 12,642 residential and 508 business mailboxes. Open the EDDM route map.

Carrier routes in 63367

63367 has 20 USPS carrier routes (1 city (C), 19 rural (R)) with 12,642 residential and 508 business mailboxes. Routes range from 215 homes (R075) to 1,095 homes (R072); the median route has 647 homes. The Census counted 11,125 households in 63367 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	2
500–749	16
750–999	0
1,000–1,499	1
1,500+	0

Best routes in 63367 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route R048 — USPS business mailboxes 170, 645 homes
Route R007 — USPS business mailboxes 154, 489 homes
Route R075 — USPS business mailboxes 53, 215 homes
Route R057 — USPS business mailboxes 34, 583 homes
Route R074 — USPS business mailboxes 20, 698 homes

Select these 5 routes on the route map

Every carrier route in 63367

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C009	City	463	12	$107,897	—	—	—
R001	Rural	679	2	$116,382	—	—	—
R004	Rural	692	1	$122,205	—	—	—
R007	Rural	489	154	$67,978	—	—	—
R008	Rural	722	13	$107,897	—	—	—
R009	Rural	634	0	$144,669	—	—	—
R013	Rural	698	19	$67,978	—	—	—
R015	Rural	587	2	$160,504	—	—	—
R022	Rural	607	1	$154,000	—	—	—
R028	Rural	649	9	$122,205	—	—	—
R036	Rural	660	3	$160,504	—	—	—
R048	Rural	645	170	$122,205	—	—	—
R057	Rural	583	34	$122,205	—	—	—
R062	Rural	739	1	$144,757	—	—	—
R065	Rural	648	2	$147,340	—	—	—
R067	Rural	559	2	$188,817	—	—	—
R070	Rural	580	1	$116,382	—	—	—
R072	Rural	1,095	9	$160,504	—	—	—
R074	Rural	698	20	$122,205	—	—	—
R075	Rural	215	53	$122,205	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 63367 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

63385 — Wentzville city, MO (3.7 mi)
63368 — O'Fallon city, MO (3.9 mi)
63365 — New Melle city, MO (6.1 mi)
63366 — O'Fallon city, MO (6.9 mi)
63304 — Weldon Spring city, MO (7.5 mi)
63341 — Defiance CDP, MO (7.9 mi)
63348 — Foristell city, MO (8.1 mi)
63376 — St. Peters city, MO (10 mi)

Areas that include 63367

O'Fallon, MO ZIP codes — 3 ZIP codes
Lake St. Louis, MO ZIP codes — 1 ZIP code
Lake Saint Louis, MO ZIP codes — 1 ZIP code
St. Charles County ZIP codes — 14 ZIP codes
Missouri ZIP code data

Where it ranks

Mail every home in 63367

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 63367, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 63367 in?: 63367 is a Lake Saint Louis, MO mailing address. By land area, 65% lies inside Lake St. Louis, 13% lies inside O'Fallon and 2% lies inside Wentzville; the rest is outside any Census-defined city or community.
What county is 63367 in?: 63367 is in St. Charles County.
What is the population of 63367?: About 29,725 people (±993), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 27,009.
What is the median household income in 63367?: $137,648 (±$11,081), compared with $70,702 for Missouri as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 63367?: 20 USPS carrier routes with 12,642 residential and 508 business mailboxes (13,150 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 63367?: The closest, measured center to center: 63385 (3.7 mi, Wentzville), 63368 (3.9 mi, O'Fallon), 63365 (6.1 mi, New Melle), 63366 (6.9 mi, O'Fallon), 63304 (7.5 mi, Weldon Spring) and 63341 (7.9 mi, Defiance).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.