| City: | Gary, Indiana |
| County: | Lake County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 9:00:32 PM |
| Population: | No Population Data |
| Area Code: | 219 |
| Classification: | PO Box |
| Coordinates: | 41.5936, -87.3467 |
| Quick Link: |
ZIP Code 46401 belongs to Gary, Indiana's main post office and mail processing facility on Martin Luther King Drive. This isn't a residential neighborhood. It's a USPS operations hub that handles mail for Gary and surrounding Lake County communities.
The facility maintains 415 PO Boxes and processes mail for the region. With 467 employees working at 11 establishments, this ZIP functions primarily as an employment center rather than a residential area. The building directory reads like a USPS organizational chart: Postmaster, Plant Manager, Distribution Operations, Business Mail Entry, Transportation Networks, and dozens more departmental offices.
Gary residents don't live in 46401. They pick up mail here or receive delivery from carriers based at this facility. The city's residential neighborhoods use other ZIP codes with standard street delivery. Located in Lake County about 30 miles southeast of Chicago, this post office serves as the postal anchor for a metropolitan area that once thrived as a steel industry hub.
General Delivery service is available for those without a permanent address. PO Boxes can be rented for personal or business use. The facility sits on Martin Luther King Drive, and all mail should use this street address or PO Box numbers for the 46401 ZIP code.
Only one street exists in this ZIP: the post office facility address on Martin Luther King Drive.
ZIP Code 46401 supports both business and residential activity. According to the Business Census (2024), there are 11 business establishments, employing about 476 people with an annual payroll of $41,344,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 542Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 11Source: CBP |
| 1st Quarter Payroll: | $12,280,000Source: CBP |
| Annual Payroll: | $41,344,000Source: CBP |
| # of Employees: | 476Source: CBP |
ZIP Code 46401 is located in Lake County, Indiana, within the Chicago-Naperville-Elgin, IL-IN Metropolitan Statistical Area (CBSA 16980) and Indiana's 1st Congressional District. This Metro area has a population of 9,461,105 people, about 0.00% of whom live in ZIP Code 46401, and is subdivided into the Lake County-Porter County-Jasper County, IN division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Chicago-Naperville-Elgin, IL-INSource: Census |
| CBSA Number: | 16980Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Lake County-Porter County-Jasper County, IN (CBSA Div 29414)Source: Census |
| CBSA Population: | 9,461,105Source: Census |
| MSA: | Chicago-Gary-Kenosha, IL-IN-WI CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 01Source: USPS |
| Congressional Land Area: | 1157.02 sq miSource: Census |
| PMSA: | Gary, IN PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 1827000Source: Census |
| Place Name: | Gary city; IndianaSource: Census |
We could not locate which school district 46401 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.