Karnes County Detention Facility
Karnes County Detention Facility
Private Federal Contract Detention FacilityMailing Address
[Detainee / Inmate Full Legal Name] — [Federal / Facility ID]
Karnes County Detention Facility
810 Commerce Street, Karnes City, TX 78118
Karnes County Detention Facility
810 Commerce Street, Karnes City, TX 78118
Physical Address
810 Commerce Street, Karnes City, TX 78118
Phone
Governing Agency
U.S. Marshals Service (USMS); operated by The GEO Group
Inmate ID
Federal / Facility ID — Not required
Last Verified
September 25, 2026
Facility Mailing and Service Information
This is a federal contract detention facility. The facility may house U.S. Marshals Service prisoners, ICE detainees, or both, depending on the current contract and population.
Always verify the person's current custody location before mailing because federal detainees and prisoners can be transferred. Use the person's full legal name and the appropriate identifier: A-Number for ICE detainees, or the current federal/facility identifier for USMS prisoners.
General mail, legal/special mail, publications, packages, money and visitation can have different procedures. Current facility-specific instructions take priority.
Always verify the person's current custody location before mailing because federal detainees and prisoners can be transferred. Use the person's full legal name and the appropriate identifier: A-Number for ICE detainees, or the current federal/facility identifier for USMS prisoners.
General mail, legal/special mail, publications, packages, money and visitation can have different procedures. Current facility-specific instructions take priority.
Source: Official sourceLast verified: September 25, 2026
Photo rules are facility-specific. Before sending photographs, verify the current quantity, size, Polaroid/self-developing-photo and content restrictions with the facility.
Do not send irreplaceable original photographs until the facility confirms how physical personal mail is handled.
Do not send irreplaceable original photographs until the facility confirms how physical personal mail is handled.
Source: Official sourceLast verified: September 25, 2026
Books, magazines, publications and packages are governed by the receiving facility's current federal-contract detention rules.
Confirm whether publications must come directly from a publisher/retailer and whether packages require prior approval. Do not use the ordinary personal-mail route for a package unless the facility specifically authorizes it.
Confirm whether publications must come directly from a publisher/retailer and whether packages require prior approval. Do not use the ordinary personal-mail route for a package unless the facility specifically authorizes it.
Source: Official sourceLast verified: September 25, 2026
Do not place cash in ordinary correspondence.
USMS prisoners and ICE detainees can use different account/deposit procedures. Confirm the person's custody status and the facility's current approved deposit method before sending a money order or using an electronic deposit service.
USMS prisoners and ICE detainees can use different account/deposit procedures. Confirm the person's custody status and the facility's current approved deposit method before sending a money order or using an electronic deposit service.
Source: Official sourceLast verified: September 25, 2026
Verify the person's current custody location before planning a visit. Visitation hours, appointment requirements, identification rules and video/legal visitation procedures are facility-specific and can change.
Use the current operator or ICE facility page and call the facility before traveling.
Use the current operator or ICE facility page and call the facility before traveling.
Source: Official sourceLast verified: September 25, 2026
How to Address Your Letter
Before mailing, verify that the person is still housed at Karnes County Detention Facility.
Address the envelope with:
- Full legal name
- Federal / Facility ID
- Facility name
- Current facility address
- Sender's full return address
Current facility address:
Karnes County Detention Facility
810 Commerce Street, Karnes City, TX 78118
If the person is in ICE custody, verify location with the ICE Online Detainee Locator. If the person is held for the U.S. Marshals Service, verify the current federal/facility identifier with the facility before mailing.
Legal mail, publications, packages and money may use separate procedures.
Address the envelope with:
- Full legal name
- Federal / Facility ID
- Facility name
- Current facility address
- Sender's full return address
Current facility address:
Karnes County Detention Facility
810 Commerce Street, Karnes City, TX 78118
If the person is in ICE custody, verify location with the ICE Online Detainee Locator. If the person is held for the U.S. Marshals Service, verify the current federal/facility identifier with the facility before mailing.
Legal mail, publications, packages and money may use separate procedures.
About Karnes County Detention Facility
Karnes County Detention Facility is a Texas contract detention facility. Current operator/client information identifies it as serving federal detention populations. Verify custody before mailing because federal prisoners and immigration detainees can be transferred.