What city is 63368 in?

63368 is a O Fallon, MO mailing address. By land area, 55% lies inside O'Fallon, 32% lies inside Dardenne Prairie and 1% lies inside Cottleville; the rest is outside any Census-defined city or community.

What county is 63368 in?

63368 is in St. Charles County.

What is the population of 63368?

About 46,966 people (±1,532), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 46,007.

What is the median household income in 63368?

$124,297 (±$8,325), 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 63368?

28 USPS carrier routes with 18,325 residential and 795 business mailboxes (19,124 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 63368?

The closest, measured center to center: 63304 (3.9 mi, Weldon Spring), 63367 (3.9 mi, Lake St. Louis), 63376 (7.1 mi, St. Peters), 63366 (7.3 mi, O'Fallon), 63341 (7.6 mi, Defiance) and 63385 (7.6 mi, Wentzville).

63368 ZIP Code, O Fallon, MO

63368 is a ZIP code in O Fallon, Missouri in St. Charles County. It covers 16 square miles of land. The closest ZIP codes are 63304, 63367 and 63376. 46,966 people live here in 17,271 households, which puts it among the most populous 1% of Missouri ZIP codes. At about 2,896 people per square mile it has suburban density, and most homes are owner-occupied (82%). Median household income is $124,297, well above the Missouri median of $70,702.

Quick facts

Mailing city: O Fallon, MO
County: St. Charles County
Land area: 16 sq mi
Population: 46,966
Median household income: $124,297
Carrier routes: 28 (18,325 homes)

Key figures

Measure	Value
Residents	46,966
Households	17,271
Median household income	$124,297
Income per person	$52,532
Median age	38
Homeowners	82.0%
Median home value	$349,200
Median rent	$1,482
Bachelor's degree or higher	50.9%
Average commute (minutes)	24.7
Households with kids under 18	38.4%
Moved in the past year	10.5%
Below the poverty line	3.8%
Broadband internet	96.4%
Speak a non-English language at home	8.4%

Household income

% of households	Value
<$10K	2.1%
$10–15K	1.2%
$15–25K	1.8%
$25–35K	2.4%
$35–50K	7.0%
$50–75K	11.5%
$75–100K	11.7%
$100–150K	24.3%
$150–200K	16.8%
$200K+	21.1%

Age

% of all residents	Value
<10	13.9%
10–19	13.6%
20–24	4.9%
25–34	13.4%
35–44	13.0%
45–54	14.5%
55–64	13.8%
65–74	6.9%
75+	5.8%

Tenure

% of housing units	Value
Owned, with mortgage	60.9%
Owned outright	19.7%
Rented	17.5%
Vacant	1.9%

Type of building

% of housing units	Value
Detached house	74.9%
Townhome	8.3%
2–4 units	2.7%
5–19 units	5.0%
20+ units	5.8%
Mobile / other	3.3%

Businesses in 63368

831 business establishments with 13,412 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 158
Professional, Scientific, and Technical Services: 92
Finance and Insurance: 88
Retail Trade: 82
Accommodation and Food Services: 77
Other Services (except Public Administration): 76
Real Estate and Rental and Leasing: 67
Administrative and Support and Waste Management and Remediation Services: 47

EDDM carrier routes

63368 has 28 USPS carrier routes with 18,325 residential and 795 business mailboxes. Open the EDDM route map.

Carrier routes in 63368

63368 has 28 USPS carrier routes (28 rural (R)) with 18,325 residential and 795 business mailboxes. Routes range from 334 homes (R077) to 902 homes (R076); the median route has 648 homes. The Census counted 17,271 households in 63368 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	2
500–749	21
750–999	5
1,000–1,499	0
1,500+	0

Best routes in 63368 for…

Most businesses

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

Route R017 — USPS business mailboxes 139, 445 homes
Route R026 — USPS business mailboxes 123, 592 homes
Route R073 — USPS business mailboxes 83, 655 homes
Route R051 — USPS business mailboxes 61, 581 homes
Route R038 — USPS business mailboxes 58, 561 homes

Select these 5 routes on the route map

Every carrier route in 63368

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R010	Rural	648	19	$152,409	—	—	—
R016	Rural	626	0	$102,956	—	—	—
R017	Rural	445	139	$110,976	—	—	—
R018	Rural	603	22	$122,738	—	—	—
R019	Rural	671	11	$122,738	—	—	—
R021	Rural	585	1	$123,560	—	—	—
R025	Rural	852	16	$103,232	—	—	—
R026	Rural	592	123	$110,261	—	—	—
R030	Rural	647	0	$123,560	—	—	—
R031	Rural	814	0	$99,870	—	—	—
R033	Rural	716	40	$129,632	—	—	—
R034	Rural	649	16	$79,508	—	—	—
R038	Rural	561	58	$129,632	—	—	—
R041	Rural	652	0	$135,547	—	—	—
R042	Rural	639	3	$150,000	—	—	—
R043	Rural	622	56	$88,295	—	—	—
R045	Rural	720	1	$104,106	—	—	—
R047	Rural	603	0	$120,623	—	—	—
R051	Rural	581	61	$79,508	—	—	—
R052	Rural	761	3	$99,870	—	—	—
R054	Rural	880	39	$158,865	—	—	—
R055	Rural	637	6	$128,611	—	—	—
R056	Rural	507	24	$79,508	—	—	—
R061	Rural	682	48	$138,344	—	—	—
R068	Rural	741	14	$152,409	—	—	—
R073	Rural	655	83	$79,508	—	—	—
R076	Rural	902	12	$99,870	—	—	—
R077	Rural	334	0	$135,547	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 63368 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

63304 — Weldon Spring city, MO (3.9 mi)
63367 — Lake St. Louis city, MO (3.9 mi)
63376 — St. Peters city, MO (7.1 mi)
63366 — O'Fallon city, MO (7.3 mi)
63341 — Defiance CDP, MO (7.6 mi)
63385 — Wentzville city, MO (7.6 mi)
63365 — New Melle city, MO (8.3 mi)
63005 — Wildwood city, MO (8.5 mi)

Areas that include 63368

O'Fallon, MO ZIP codes — 3 ZIP codes
Dardenne Prairie, 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 63368

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) 63368, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 63368 in?: 63368 is a O Fallon, MO mailing address. By land area, 55% lies inside O'Fallon, 32% lies inside Dardenne Prairie and 1% lies inside Cottleville; the rest is outside any Census-defined city or community.
What county is 63368 in?: 63368 is in St. Charles County.
What is the population of 63368?: About 46,966 people (±1,532), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 46,007.
What is the median household income in 63368?: $124,297 (±$8,325), 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 63368?: 28 USPS carrier routes with 18,325 residential and 795 business mailboxes (19,124 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 63368?: The closest, measured center to center: 63304 (3.9 mi, Weldon Spring), 63367 (3.9 mi, Lake St. Louis), 63376 (7.1 mi, St. Peters), 63366 (7.3 mi, O'Fallon), 63341 (7.6 mi, Defiance) and 63385 (7.6 mi, Wentzville).

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