First three digits · Illinois
ZIP Codes Starting with
5 ZIP codes start with 607, sorted at the Chicago, IL (SCF 606) sectional center (USPS labeling list L005, effective October 1, 2026) in Illinois: 4 residential ZIP codes across 1 county and 1 PO Box or single-organization code (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 607 mean?
The first digit, 6, is one of ten national areas (Illinois, Kansas, Missouri and Nebraska). The first three, 607, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 607 to the Chicago, IL (SCF 606) facility. The last two digits pick the delivery area. By residents, the largest town names among the 607 ZIP codes are Elmwood Park, Niles, Harwood Heights and Lincolnwood.
The same facility sorts 3 prefixes, 92 ZIP codes in all: 606, 607, 608.
Where are the 607 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 607
| County | ||||||
|---|---|---|---|---|---|---|
| 60701 | Chicago | Cook County | PO Box or unique | – | – | – |
| 60706 | Harwood Heights | Cook County | 24,260 | 7,872 | $85k | $358k |
| 60707 | Elmwood Park | Cook County | 41,116 | 11,491 | $85k | $332k |
| 60712 | Lincolnwood | Cook County | 13,112 | 4,871 | $110k | $496k |
| 60714 | Niles | Cook County | 30,305 | 4,826 | $76k | $359k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.