63373 ZIP Code, Portage Des Sioux, MO
63373 is a ZIP code in Portage Des Sioux, Missouri in St. Charles County. It covers 19 square miles of land. The closest ZIP codes are 62028, 62022 and 63301. 690 people live here in 260 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (86%). Median household income is $88,750, above the Missouri median of $70,702; the median age is 46.0, older than most ZIP codes.
Quick facts
- Mailing city: Portage Des Sioux, MO
- County: St. Charles County
- Land area: 19 sq mi
- Population: 690
- Median household income: $88,750
- Carrier routes: 1 (291 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 690 |
| Households | 260 |
| Median household income | $88,750 |
| Income per person | $48,564 |
| Median age | 46 |
| Homeowners | 85.8% |
| Median home value | $221,300 |
| Median rent | $1,082 |
| Bachelor's degree or higher | 24.1% |
| Average commute (minutes) | 24.8 |
| Households with kids under 18 | 28.8% |
| Moved in the past year | 7.8% |
| Below the poverty line | 8.0% |
| Broadband internet | 92.7% |
| Speak a non-English language at home | 1.8% |
Household income
| % of households | Value |
|---|---|
| <$10K | 6.5% |
| $10–15K | 0.0% |
| $15–25K | 3.1% |
| $25–35K | 6.2% |
| $35–50K | 15.0% |
| $50–75K | 12.7% |
| $75–100K | 7.3% |
| $100–150K | 12.7% |
| $150–200K | 19.2% |
| $200K+ | 17.3% |
Age
| % of all residents | Value |
|---|---|
| <10 | 7.4% |
| 10–19 | 10.1% |
| 20–24 | 9.1% |
| 25–34 | 8.6% |
| 35–44 | 11.2% |
| 45–54 | 24.9% |
| 55–64 | 17.7% |
| 65–74 | 6.1% |
| 75+ | 4.9% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 50.3% |
| Owned outright | 23.7% |
| Rented | 12.0% |
| Vacant | 14.0% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 90.8% |
| Townhome | 0.0% |
| 2–4 units | 6.6% |
| 5–19 units | 0.0% |
| 20+ units | 0.0% |
| Mobile / other | 2.6% |
Businesses in 63373
13 business establishments with 60 employees (ZIP Codes Business Patterns 2023).
- Construction: 3
EDDM carrier routes
63373 has 1 USPS carrier routes with 291 residential and 23 business mailboxes. Open the EDDM route map.
Carrier routes in 63373
63373 has 1 USPS carrier routes (1 rural (R)) with 291 residential and 23 business mailboxes. Routes range from 291 homes (R041) to 291 homes (R041); the median route has 291 homes. The Census counted 260 households in 63373 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 1 |
| 500–749 | 0 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Every carrier route in 63373
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R041 | Rural | 291 | 23 | $100,358 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 63373 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
- 62028 — Elsah village, IL (2.6 mi)
- 62022 (6 mi)
- 63301 — St. Charles city, MO (6.5 mi)
- 62037 — Grafton city, IL (7.1 mi)
- 63034 — Old Jamestown CDP, MO (7.8 mi)
- 62035 — Godfrey village, IL (7.9 mi)
- 63031 — Florissant city, MO (8.3 mi)
- 63386 — West Alton city, MO (9.8 mi)
Areas that include 63373
- Portage Des Sioux, MO ZIP codes — 1 ZIP code
- St. Charles County ZIP codes — 14 ZIP codes
- Missouri ZIP code data
Mail every home in 63373
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) 63373, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 63373 in?
- 63373 is a Portage Des Sioux, MO mailing address. By land area, 3% lies inside Portage Des Sioux; the rest is outside any Census-defined city or community.
- What county is 63373 in?
- 63373 is in St. Charles County.
- What is the population of 63373?
- About 690 people (±202), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 617.
- What is the median household income in 63373?
- $88,750 (±$48,880), 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 63373?
- 1 USPS carrier routes with 291 residential and 23 business mailboxes (314 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 63373?
- The closest, measured center to center: 62028 (2.6 mi, Elsah), 62022 (6 mi), 63301 (6.5 mi, St. Charles), 62037 (7.1 mi, Grafton), 63034 (7.8 mi, Old Jamestown) and 62035 (7.9 mi, Godfrey).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.