| City: | Dearborn, Michigan |
| County: | Wayne County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 10:12:36 PM |
| Population: | No Population Data |
| Area Code: | 313 |
| Classification: | PO Box |
| Coordinates: | 42.3225, -83.1764 |
| Quick Link: |
The facility sits on Greenfield Road, which has 107 delivery records in this ZIP's routing system. Like many PO Box-only ZIPs in urban areas, 48121 provides mail services for customers who need dedicated boxes while their street addresses fall under a different ZIP code. This dual-ZIP arrangement is common in cities where post offices serve both PO Box customers and street delivery routes.
Only one street appears in this ZIP's delivery system—Greenfield Road, where the post office facility itself is located. This confirms 48121's role as a PO Box service center rather than a geographic delivery zone.
ZIP Code 48121 supports both business and residential activity. According to the Business Census (2024), there are 30 business establishments, employing about 4,573 people with an annual payroll of $438,043,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 991Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 30Source: CBP |
| 1st Quarter Payroll: | $138,284,000Source: CBP |
| Annual Payroll: | $438,043,000Source: CBP |
| # of Employees: | 4,573Source: CBP |
ZIP Code 48121 is located in Wayne County, Michigan, within the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area (CBSA 19820) and Michigan's 12nd Congressional District. This Metro area has a population of 4,296,250 people, about 0.00% of whom live in ZIP Code 48121, and is subdivided into the Detroit-Dearborn-Livonia, MI division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Detroit-Warren-Dearborn, MISource: Census |
| CBSA Number: | 19820Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Detroit-Dearborn-Livonia, MI (CBSA Div 19804)Source: Census |
| CBSA Population: | 4,296,250Source: Census |
| MSA: | Detroit-Ann Arbor-Flint, MI CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 12Source: USPS |
| Congressional Land Area: | 403.21 sq miSource: Census |
| PMSA: | Detroit, MI PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2621000Source: Census |
| Place Name: | Dearborn city; MichiganSource: Census |
We could not locate which school district 48121 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 March 1, 2026.