| City: | Saint Louis, Missouri |
| County: | Saint Louis City County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 8:25:06 AM |
| Population: | No Population Data |
| Area Codes: | 314 / 557 |
| Classification: | PO Box |
| Coordinates: | 38.6272, -90.1978 |
| Quick Link: |
ZIP code 63178 serves downtown St. Louis as a PO Box facility located on Market Street. The 61 boxes here handle mail for businesses and organizations rather than residential customers. This isn't a standalone community but rather a specialized postal service within the larger urban environment of St. Louis City.
The facility operates within the broader downtown postal network, with standard street delivery available through neighboring ZIP 63103. The Market Street location places it in the heart of the Downtown West neighborhood, where city carrier routes handle most business mail. The PO Box service here complements rather than replaces street delivery, giving businesses a consistent mailing address independent of their physical location.
Only Market Street appears in the postal data, reflecting the facility's single-location nature in the downtown business district.
ZIP Code 63178 supports both business and residential activity. According to the Business Census (2024), there are 3 business establishments, employing about 239 people with an annual payroll of $59,403,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 120Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 3Source: CBP |
| 1st Quarter Payroll: | $18,286,000Source: CBP |
| Annual Payroll: | $59,403,000Source: CBP |
| # of Employees: | 239Source: CBP |
ZIP Code 63178 is located in Saint Louis City County, Missouri, within the St. Louis, MO-IL Metropolitan Statistical Area (CBSA 41180) and Missouri's 1st Congressional District. This Metro area has a population of 2,812,896 people, about 0.00% of whom live in ZIP Code 63178. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | St. Louis, MO-ILSource: Census |
| CBSA Number: | 41180Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 2,812,896Source: Census |
| MSA: | St. Louis, MO-IL MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 01Source: USPS |
| Congressional Land Area: | 225.36 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2965000Source: Census |
| Place Name: | St. Louis city; MissouriSource: Census |
We could not locate which school district 63178 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.