| City: | Rockford, Illinois |
| County: | Winnebago County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:22:10 PM |
| Population: | No Population Data |
| Area Codes: | 779 / 815 |
| Classification: | PO Box |
| Coordinates: | 42.2712, -89.0939 |
| Quick Link: |
ZIP code 61125 isn't a neighborhood or town. It's the dedicated ZIP for the Rockford, Illinois Processing and Distribution Center, the USPS facility that sorts and routes mail for the greater Rockford region. Located on Harrison Avenue in the southeast part of the city, this facility employs over 3,600 workers and handles mail operations for Winnebago County and surrounding areas.
The 30 named "buildings" in postal records aren't separate structures. They're internal department codes for routing mail within the facility: Manager Distribution Operations, Inspection Service, Customer Relations Coordinator, and similar administrative units. Each department has its own delivery point for internal correspondence. The 196 PO Boxes serve employees and contractors who need mail delivered directly to their workplace.
Rockford's main post office operates under separate ZIP codes for retail customers. This ZIP exists purely for internal USPS operations and administrative mail. The 183 business delivery points and 2 city carrier routes (C routes) handle correspondence addressed to specific departments within the processing center. If you're mailing something to a friend in Rockford, you won't use 61125. But if you're sending documents to the District Manager or Postal Inspection Service at this facility, this is where it goes.
One street address houses the entire processing center, with internal routing codes directing mail to specific departments.
ZIP Code 61125 supports both business and residential activity. According to the Business Census (2024), there are 14 business establishments, employing about 5,808 people with an annual payroll of $523,723,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 535Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 14Source: CBP |
| 1st Quarter Payroll: | $129,743,000Source: CBP |
| Annual Payroll: | $523,723,000Source: CBP |
| # of Employees: | 5,808Source: CBP |
ZIP Code 61125 is located in Winnebago County, Illinois, within the Rockford, IL Metropolitan Statistical Area (CBSA 40420) and Illinois's 17th Congressional District. This Metro area has a population of 336,605 people, about 0.00% of whom live in ZIP Code 61125. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Rockford, ILSource: Census |
| CBSA Number: | 40420Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 336,605Source: Census |
| MSA: | Rockford, IL MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 17Source: USPS |
| Congressional Land Area: | 6933.08 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 1765000Source: Census |
| Place Name: | Rockford city; IllinoisSource: Census |
We could not locate which school district 61125 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.