| City: | Flint, Michigan |
| Names to Avoid: | Buick City, Buick Oldsmobile Cadillac |
| County: | Genesee County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 10:15:50 PM |
| Population: | No Population Data |
| Area Code: | 810 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 43.0340, -83.6888 |
| Quick Link: |
Buick City, the historic General Motors manufacturing complex in Genesee County, Michigan, operates under dedicated ZIP code 48550. From 1904 to 1999, Buick City served as Buick's home plant and was once the world's largest factory, consisting of 24 separate buildings. The facility was renamed Buick City in 1984 when GM consolidated multiple factories into a single just-in-time manufacturing complex inspired by Toyota's production methods.
Despite winning J.D. Power's Platinum Award for assembly quality in 1999, the plant closed that same year due to declining sedan sales. At its peak in the mid-1980s, Buick City employed 28,000 workers; only 1,200 remained when it shuttered. The complex was demolished between 2001 and 2003. In 2023, state and GM officials broke ground on the Flint Commerce Center, a $300 million redevelopment of the site that could provide 3,000 new jobs. Flint is the valid mailing city for this designation.
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 48550 is assigned to a single organization or institution. Detailed business demographics are not published for unique ZIP Codes.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 1,477Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 0Source: CBP |
| 1st Quarter Payroll: | $0Source: CBP |
| Annual Payroll: | $0Source: CBP |
| # of Employees: | 0Source: CBP |
ZIP Code 48550 is located in Genesee County, Michigan, within the Flint, MI Metropolitan Statistical Area (CBSA 22420) and Michigan's 8th Congressional District. This Metro area has a population of 425,790 people, about 0.00% of whom live in ZIP Code 48550. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Flint, MISource: Census |
| CBSA Number: | 22420Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 425,790Source: Census |
| MSA: | Detroit-Ann Arbor-Flint, MI CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 08Source: USPS |
| Congressional Land Area: | 1503.18 sq miSource: Census |
| PMSA: | Flint, MI PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2629000Source: Census |
| Place Name: | Flint city; MichiganSource: Census |
We could not locate which school district 48550 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.