What city is 63138 in?

63138 is a Saint Louis, MO mailing address. By land area, 40% lies inside Spanish Lake and 1% lies inside St. Louis; the rest is outside any Census-defined city or community.

What is the population of 63138?

About 18,233 people (±1,523), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 18,852.

What is the median household income in 63138?

$56,096 (±$4,649), 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 63138?

14 USPS carrier routes with 7,398 residential and 196 business mailboxes (7,594 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 63138?

The closest, measured center to center: 62048 (3.6 mi, Madison), 63137 (3.7 mi, Bellefontaine Neighbors), 63033 (4.4 mi, Florissant), 63386 (5 mi, West Alton), 63136 (5.3 mi, Jennings) and 63034 (6 mi, Old Jamestown).

63138 ZIP Code, Saint Louis, MO

63138 is a ZIP code in Saint Louis, Missouri in St. Louis County. It covers 19 square miles of land. The closest ZIP codes are 62048, 63137 and 63033. 18,233 people live here in 7,339 households. With about 984 people per square mile it is lightly settled, and owners and renters are mixed (50% own). Median household income is $56,096, below the Missouri median of $70,702.

Quick facts

Mailing city: Saint Louis, MO
County: St. Louis County
Land area: 19 sq mi
Population: 18,233
Median household income: $56,096
Carrier routes: 14 (7,398 homes)

Key figures

Measure	Value
Residents	18,233
Households	7,339
Median household income	$56,096
Income per person	$30,043
Median age	33.1
Homeowners	49.9%
Median home value	$139,100
Median rent	$1,161
Bachelor's degree or higher	15.6%
Average commute (minutes)	24.6
Households with kids under 18	31.3%
Moved in the past year	13.7%
Below the poverty line	14.6%
Broadband internet	92.7%
Speak a non-English language at home	2.3%

Household income

% of households	Value
<$10K	6.9%
$10–15K	4.3%
$15–25K	7.6%
$25–35K	10.1%
$35–50K	14.9%
$50–75K	23.2%
$75–100K	10.3%
$100–150K	14.6%
$150–200K	4.5%
$200K+	3.6%

Age

% of all residents	Value
<10	13.3%
10–19	17.5%
20–24	6.9%
25–34	14.9%
35–44	9.9%
45–54	12.4%
55–64	13.3%
65–74	7.5%
75+	4.4%

Tenure

% of housing units	Value
Owned, with mortgage	26.7%
Owned outright	14.0%
Rented	40.2%
Vacant	19.1%

Type of building

% of housing units	Value
Detached house	64.2%
Townhome	9.5%
2–4 units	6.6%
5–19 units	13.5%
20+ units	6.1%
Mobile / other	0.0%

Businesses in 63138

158 business establishments with 1,791 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 53
Retail Trade: 25
Other Services (except Public Administration): 18
Real Estate and Rental and Leasing: 15
Construction: 9
Administrative and Support and Waste Management and Remediation Services: 8
Professional, Scientific, and Technical Services: 7
Accommodation and Food Services: 7

EDDM carrier routes

63138 has 14 USPS carrier routes with 7,398 residential and 196 business mailboxes. Open the EDDM route map.

Carrier routes in 63138

63138 has 14 USPS carrier routes (14 city (C)) with 7,398 residential and 196 business mailboxes. Routes range from 253 homes (C026) to 794 homes (C032); the median route has 531 homes. The Census counted 7,339 households in 63138 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	5
500–749	8
750–999	1
1,000–1,499	0
1,500+	0

Best routes in 63138 for…

Most businesses

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

Route C024 — USPS business mailboxes 44, 557 homes
Route C005 — USPS business mailboxes 32, 444 homes
Route C026 — USPS business mailboxes 28, 253 homes
Route C030 — USPS business mailboxes 23, 559 homes
Route C033 — USPS business mailboxes 20, 539 homes

Select these 5 routes on the route map

Every carrier route in 63138

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C003	City	496	1	$38,755	—	—	—
C005	City	444	32	$51,397	—	—	—
C006	City	493	5	$73,431	—	—	—
C009	City	515	1	$38,755	—	—	—
C024	City	557	44	$103,602	—	—	—
C025	City	459	10	$51,397	—	—	—
C026	City	253	28	$55,026	—	—	—
C028	City	568	8	$77,199	—	—	—
C030	City	559	23	$103,602	—	—	—
C032	City	794	3	$32,715	—	—	—
C033	City	539	20	$65,015	—	—	—
C077	City	649	5	$103,602	—	—	—
C082	City	549	9	$65,015	—	—	—
C083	City	523	7	$51,397	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 63138 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

62048 — Madison city, IL (3.6 mi)
63137 — Bellefontaine Neighbors city, MO (3.7 mi)
63033 — Florissant city, MO (4.4 mi)
63386 — West Alton city, MO (5 mi)
63136 — Jennings city, MO (5.3 mi)
63034 — Old Jamestown CDP, MO (6 mi)
62087 — South Roxana village, IL (6.6 mi)
63135 — Ferguson city, MO (6.7 mi)

Areas that include 63138

Spanish Lake, MO ZIP codes — 1 ZIP code
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 63138

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) 63138, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 63138 in?: 63138 is a Saint Louis, MO mailing address. By land area, 40% lies inside Spanish Lake and 1% lies inside St. Louis; the rest is outside any Census-defined city or community.
What county is 63138 in?: 63138 is in St. Louis County.
What is the population of 63138?: About 18,233 people (±1,523), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 18,852.
What is the median household income in 63138?: $56,096 (±$4,649), 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 63138?: 14 USPS carrier routes with 7,398 residential and 196 business mailboxes (7,594 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 63138?: The closest, measured center to center: 62048 (3.6 mi, Madison), 63137 (3.7 mi, Bellefontaine Neighbors), 63033 (4.4 mi, Florissant), 63386 (5 mi, West Alton), 63136 (5.3 mi, Jennings) and 63034 (6 mi, Old Jamestown).

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