What city is 63128 in?

63128 is a Saint Louis, MO mailing address. By land area, 27% lies inside Concord, 15% lies inside Sunset Hills and 8% lies inside Sappington; the rest is outside any Census-defined city or community.

What is the population of 63128?

About 30,540 people (±1,454), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 29,728.

What is the median household income in 63128?

$92,359 (±$9,940), 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 63128?

29 USPS carrier routes with 13,196 residential and 559 business mailboxes (13,756 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 63128?

The closest, measured center to center: 63127 (3.4 mi, Sunset Hills), 63026 (4 mi, Fenton), 63126 (4 mi, Crestwood), 63010 (4.3 mi, Arnold), 63129 (4.3 mi, Oakville) and 63123 (5 mi, Affton).

63128 ZIP Code, Saint Louis, MO

63128 is a ZIP code in Saint Louis, Missouri in St. Louis County. It covers 16 square miles of land. The closest ZIP codes are 63127, 63026 and 63126. 30,540 people live here in 13,032 households, more than in 9 of every 10 Missouri ZIP codes. At about 1,952 people per square mile it has suburban density, and most homes are owner-occupied (79%). Median household income is $92,359, above the Missouri median of $70,702; the median age is 47.9, older than most ZIP codes.

Quick facts

Mailing city: Saint Louis, MO
County: St. Louis County
Land area: 16 sq mi
Population: 30,540
Median household income: $92,359
Carrier routes: 29 (13,196 homes)

Key figures

Measure	Value
Residents	30,540
Households	13,032
Median household income	$92,359
Income per person	$56,137
Median age	47.9
Homeowners	79.3%
Median home value	$338,700
Median rent	$1,193
Bachelor's degree or higher	45.4%
Average commute (minutes)	23.9
Households with kids under 18	23.4%
Moved in the past year	8.6%
Below the poverty line	4.7%
Broadband internet	94.5%
Speak a non-English language at home	5.8%

Household income

% of households	Value
<$10K	2.6%
$10–15K	1.1%
$15–25K	6.9%
$25–35K	6.2%
$35–50K	7.9%
$50–75K	17.9%
$75–100K	9.9%
$100–150K	18.0%
$150–200K	13.6%
$200K+	15.9%

Age

% of all residents	Value
<10	8.9%
10–19	10.5%
20–24	6.6%
25–34	9.4%
35–44	11.1%
45–54	11.2%
55–64	14.6%
65–74	15.6%
75+	12.1%

Tenure

% of housing units	Value
Owned, with mortgage	45.3%
Owned outright	30.7%
Rented	19.5%
Vacant	4.4%

Type of building

% of housing units	Value
Detached house	70.5%
Townhome	8.0%
2–4 units	4.5%
5–19 units	9.7%
20+ units	6.7%
Mobile / other	0.5%

Businesses in 63128

751 business establishments with 13,976 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 189
Construction: 77
Professional, Scientific, and Technical Services: 68
Retail Trade: 62
Other Services (except Public Administration): 58
Finance and Insurance: 55
Real Estate and Rental and Leasing: 53
Accommodation and Food Services: 46

EDDM carrier routes

63128 has 29 USPS carrier routes with 13,196 residential and 559 business mailboxes. Open the EDDM route map.

Carrier routes in 63128

63128 has 29 USPS carrier routes (26 city (C), 3 rural (R)) with 13,196 residential and 559 business mailboxes. Routes range from 75 homes (C017) to 610 homes (C012); the median route has 460 homes. The Census counted 13,032 households in 63128 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	2
250–499	18
500–749	9
750–999	0
1,000–1,499	0
1,500+	0

Best routes in 63128 for…

Most businesses

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

Route C034 — USPS business mailboxes 91, 339 homes
Route C016 — USPS business mailboxes 91, 213 homes
Route C017 — USPS business mailboxes 61, 75 homes
Route C094 — USPS business mailboxes 51, 415 homes
Route C015 — USPS business mailboxes 49, 448 homes

Select these 5 routes on the route map

Every carrier route in 63128

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C012	City	610	32	$140,820	—	—	—
C015	City	448	49	$93,683	—	—	—
C016	City	213	91	$97,330	—	—	—
C017	City	75	61	$115,186	—	—	—
C019	City	482	3	$97,330	—	—	—
C020	City	473	3	$107,258	—	—	—
C027	City	427	2	$88,642	—	—	—
C028	City	417	6	$83,835	—	—	—
C030	City	329	39	$123,839	—	—	—
C032	City	434	11	$100,686	—	—	—
C034	City	339	91	$140,820	—	—	—
C036	City	531	1	$121,257	—	—	—
C056	City	491	16	$83,835	—	—	—
C058	City	400	2	$107,258	—	—	—
C059	City	599	1	$100,686	—	—	—
C060	City	524	0	$83,835	—	—	—
C061	City	464	2	$88,642	—	—	—
C062	City	460	0	$83,835	—	—	—
C063	City	458	1	$123,839	—	—	—
C064	City	476	1	$107,258	—	—	—
C065	City	373	2	$123,839	—	—	—
C066	City	446	24	$107,258	—	—	—
C067	City	388	2	$121,257	—	—	—
C068	City	598	10	$115,186	—	—	—
C092	City	581	27	$97,330	—	—	—
C094	City	415	51	$140,820	—	—	—
R009	Rural	596	11	$93,683	—	—	—
R021	Rural	567	14	$93,683	—	—	—
R095	Rural	582	6	$78,854	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 63128 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

63127 — Sunset Hills city, MO (3.4 mi)
63026 — Fenton city, MO (4 mi)
63126 — Crestwood city, MO (4 mi)
63010 — Arnold city, MO (4.3 mi)
63129 — Oakville CDP, MO (4.3 mi)
63123 — Affton CDP, MO (5 mi)
63125 — Lemay CDP, MO (5.4 mi)
63122 — Kirkwood city, MO (6.3 mi)

Areas that include 63128

Concord, MO ZIP codes — 2 ZIP codes
Sunset Hills, MO ZIP codes — 2 ZIP codes
Sappington, MO ZIP codes — 2 ZIP codes
Saint Louis, MO ZIP codes — 45 ZIP codes
St. Louis County ZIP codes — 46 ZIP codes
Missouri ZIP code data

Where it ranks

Mail every home in 63128

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) 63128, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 63128 in?: 63128 is a Saint Louis, MO mailing address. By land area, 27% lies inside Concord, 15% lies inside Sunset Hills and 8% lies inside Sappington; the rest is outside any Census-defined city or community.
What county is 63128 in?: 63128 is in St. Louis County.
What is the population of 63128?: About 30,540 people (±1,454), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 29,728.
What is the median household income in 63128?: $92,359 (±$9,940), 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 63128?: 29 USPS carrier routes with 13,196 residential and 559 business mailboxes (13,756 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 63128?: The closest, measured center to center: 63127 (3.4 mi, Sunset Hills), 63026 (4 mi, Fenton), 63126 (4 mi, Crestwood), 63010 (4.3 mi, Arnold), 63129 (4.3 mi, Oakville) and 63123 (5 mi, Affton).

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