| City: | Saint Louis, Missouri |
| County: | Saint Louis City County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 12:05:51 AM |
| Population: | No Population Data |
| Area Codes: | 314 / 557 |
| Classification: | PO Box |
| Coordinates: | 38.6272, -90.1978 |
| Quick Link: |
ZIP code 63166 serves a concentrated business district in downtown St. Louis, centered on Market Street. The postal designation covers 142 businesses but only 3 residential delivery points, making this primarily a commercial mail hub. It's entirely surrounded by the larger ZIP 63103, which handles most downtown residential and business delivery.
This isn't a traditional neighborhood ZIP. The post office maintains just 2 PO Boxes while servicing 22 delivery points along Market Street through city carrier routes. With zero recorded population in the official count and no measurable land area, 63166 functions as an administrative overlay for specific downtown addresses rather than a geographic community.
Market Street is the only street in this ZIP code, serving as the spine for a narrow commercial district in downtown St. Louis. The concentration on a single historic street name reflects the ZIP's role as an administrative designation for specific business addresses rather than a geographic neighborhood.
ZIP Code 63166 supports both business and residential activity. According to the Business Census (2024), there are 8 business establishments, employing about 77 people with an annual payroll of $5,825,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 141Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 8Source: CBP |
| 1st Quarter Payroll: | $1,686,000Source: CBP |
| Annual Payroll: | $5,825,000Source: CBP |
| # of Employees: | 77Source: CBP |
ZIP Code 63166 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 2,809,414 people, about 0.00% of whom live in ZIP Code 63166. 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: | 2,809,414Source: 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 63166 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 January 1, 2026.