Rock Island, IL ZIP Codes
Rock Island, Illinois has 3 ZIP codes: for street addresses, for PO boxes and for a single organization.
Mail addressed to Rock Island covers nearby places too.
Where the 61201 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
61204 and 61299 have no area on the map: they are PO box or single-organization ZIP codes. Dashed line: Rock Island city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Rock Island
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Rock Island PO box and business ZIP codes
| ZIP | Type and post office or station |
|---|---|
| 61201 | street delivery Rock Island |
| 61204 | PO boxes at the Downtown Rock Island post office Downtown Rock Island |
| 61299 | one organization Rock Island |
ZIP codes from nearby towns that reach into Rock Island
- 61264, mailing town Milan, covers 6 percent of Rock Island
Why your mail may say Rock Island when you live outside it
Rock Island ZIP codes also cover South Rock Island Township, Rock Island Township and Rock Island Arsenal, so a letter addressed to Rock Island can go to a home outside the city limits.
The reverse happens too: parts of Rock Island use 61264, which mails under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Rock Island County property records show which city you are in.
Rock Island ZIP code questions
What is the main ZIP code for Rock Island?
61201, the ZIP code of the main Rock Island post office at 2633 11th St.
Which Rock Island ZIP codes are for PO boxes only?
61204. Mail to it goes to boxes at the post office, not to street addresses.
What county is Rock Island in?
Rock Island County.
ZIP codes for towns near Rock Island
More towns near Rock Island: Peoria, Dubuque, Pekin, Rockford, DeKalb, Normal, Beloit, Bloomington, Quincy.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections