Rock Island County Jail
Rock Island County Jail
County Jail / Adult Detention FacilityMailing Address
Rock Island County Jail - Illinois
[Inmate Full Name] — [Inmate Identifier]
P.O. Box 247
Phoenix, MD 21131
[Inmate Full Name] — [Inmate Identifier]
P.O. Box 247
Phoenix, MD 21131
Physical Address
1317 3rd Avenue, Rock Island, IL 61201
Phone
Governing Agency
Rock Island County Sheriff's Office
Inmate ID
Inmate Identifier — Required
Last Verified
September 27, 2026
Facility Mailing and Service Information
Use Rock Island County Jail - Illinois, inmate full name and identifier, P.O. Box 247, Phoenix, MD 21131.
Source: Official sourceLast verified: September 27, 2026
Photos may be scanned under current content rules. Do not send irreplaceable originals.
Source: Official sourceLast verified: September 27, 2026
Do not send publications or packages to the electronic personal-mail processor unless specifically authorized.
Source: Official sourceLast verified: September 27, 2026
Legal mail and money orders use the direct Rock Island County Jail address, not the Phoenix personal-mail processor.
Source: Official sourceLast verified: September 27, 2026
Verify current custody, visitor approval/registration requirements and the current visitation or video-visitation schedule before traveling.
Source: Official sourceLast verified: September 27, 2026
How to Address Your Letter
Use the current Rock Island County electronic-mail FAQ format: full facility name/state, inmate full name and identifier, P.O. Box 247, Phoenix, MD 21131. Include the sender's full name and physical return address. Legal mail and money orders use the direct jail address at 1317 3rd Avenue.
About Rock Island County Jail
Rock Island County Jail is at 1317 3rd Avenue. Personal correspondence is digitally processed through the county's electronic inmate-mail system.