Diamondback Correctional Facility

Diamondback Correctional Facility is an ICE Enforcement and Removal Operations (ERO) detention facility located in Watonga, Oklahoma. It falls under the Dallas Field Office ERO field office area of responsibility.

Facility quick reference

How to locate or contact a detainee

To locate someone in ICE custody, use the ICE Online Detainee Locator System at locator.ice.gov. You will need the person’s A-number (Alien Registration Number) and country of birth, or their full name, country of birth, and date of birth.

ICE publishes two different numbers for this facility. To ask whether someone is held here, call (888) 351-4024; ICE lists it as answered Monday to Friday (excluding holidays), 8 a.m. to 8 p.m. Eastern. CoreCivic’s page for this facility identifies 1-888-351-4024 as the ICE Detention Reporting and Information Line (DRIL). To leave an urgent message for a detainee, call (580) 614-2100, ext. 42225, and leave the detainee’s full name and alien registration number (A-number), plus your own name and a phone number where you can be reached; the facility passes the message on. Detainees cannot receive incoming calls — they place outgoing calls themselves. Have the person’s biographical information ready when you call (first, last and hyphenated names, any aliases, date of birth, and country of birth). This facility has tablets; ICE points to Talton.com for instructions on sending a non-confidential message.

Visiting in person

ICE’s page for this facility (last updated 08/06/2026, checked September 24, 2026) does not post a visiting calendar. What it publishes instead:

• Book by phone: call (580) 614-2100, ext. 42225 to schedule a visit — the same extension ICE lists for urgent messages and for legal-scheduling emergencies.
• Weekly allowance: each detainee receives two one-hour blocks of visitation time per week, and each visit counts as one hour, regardless of how long it lasts.
• Age and ID: visitors without an adult must be at least 18. Anyone under 18 must be accompanied by a parent or guardian, and proof of the relationship is required — for example a birth certificate or a court-ordered guardianship. Every visitor must bring a government-issued photo ID.
• Non-contact: all family and social visits are non-contact. Visitors may not pass items to detainees or carry items into the visitation area, and anyone who is or appears to be intoxicated is refused.

Everyone entering the facility or the visitation area is subject to a pat-down search, an inspection of belongings and a metal scan, and no electronic devices (cell phones, pagers, radios) are allowed in the secure areas. ICE lists free public parking at the facility.

Sending mail, commissary funds, and personal items

Letters and packages sent to a detainee must show the detainee’s full name and A-number, along with the sender’s name and return address — and each facility publishes its own exact format: some also require a housing-unit number, and facilities run by the federal Bureau of Prisons use the BOP register number instead. ICE lists each facility’s format on that facility’s page at ice.gov. This facility’s own ICE page says incoming mail “is not read upon opening, only inspected by the delivering officer”. ICE’s 2019 national standard allows more than that. Under ICE’s National Detention Standards, Revised 2019, §5.1(E) — cited here for comparison only, because ICE’s fiscal-year 2026 detention statistics (released July 20, 2026) list the National Detention Standards (NDS) 2025 as the standard of this facility’s last inspection (October 15, 2025), and we have not reviewed that standard’s mail rules — incoming general mail is opened and inspected for contraband, and outgoing general mail may be inspected and read if it is addressed to another detainee or staff have reason to believe it threatens the facility’s security or order, endangers someone, or could facilitate criminal activity. Only special correspondence — mail to or from attorneys and other legal representatives, courts and judges, government attorneys, embassies and consulates, the President and Vice President of the United States, members of Congress, the Department of Justice (including the immigration courts), DHS (including ICE/ERO, IHSC, CRCL and the DHS Inspector General), grievance administrators, and the news media — may not be read or copied by staff. Incoming special correspondence is inspected for contraband in the detainee’s presence; outgoing special correspondence is not opened, inspected or read, and if a need exists, any inspection takes place in the detainee’s presence. The standard limits any inspection to detecting physical contraband and confirming that enclosures qualify as special correspondence. Mail counts as special correspondence only if the envelope unambiguously identifies the title and office of the sender (incoming mail) or of the addressee (outgoing mail); PBNDS 2011 also requires the envelope to be labeled “special correspondence” or “legal mail.” Rules for commissary (account) deposits and permitted personal items vary by facility, and so does the number that handles them — ICE names a separate facility mail clerk on some facility pages. This facility’s deposit route, accepted form of payment and contacts are in the Sending Items to Detainees section of its own ICE page (linked above).

What ICE publishes for this facility’s mail, money, and packages

• How to address mail: ICE’s format is the detainee’s name with the last 4 digits of the A-number, followed by the address. With the facility address ICE lists:

Detainee Name (last 4 of A#)
1000 Diamondback Road
Watonga, OK 73772

• What the facility will not accept by mail: packages, obscene or pornographic material, personal checks, cashier’s checks, postage stamps or stamped envelopes, any type of food, and periodicals not sent directly from the publisher.
• Money is not to be given directly to the detainee. ICE lists three routes: call ViaPath at 1-888-988-4768; use ViaPath’s website; or send a money order by U.S. mail to 1000 Diamondback Rd, Watonga, OK 73772, referencing the detainee’s name on the money order. Funds that arrive by mail are taken to processing, put on the account and receipted; ICE cautions against having cash sent. CoreCivic’s own facility page also links money-transfer instructions for Western Union, ViaPath and a lockbox.
• Packages: the detainee must first get approval by filling out a package approval form and obtaining authorization from the warden to receive property. Items are limited to those needed solely for travel or release from custody, with the ICE Deportation Officer’s approval.
• Stamps: detainees may buy them; indigent detainees get a postage allowance at government expense.
• Transfers and departures: only legal mail is forwarded; general correspondence is returned to sender.
• Luggage for removal: one small piece is allowed; if the person has none, luggage can be sent or delivered after approval from the Supervisory Deportation Officer. No electronic devices are accepted.

CoreCivic lockbox instructions (linked from CoreCivic’s Diamondback facility page, checked October 17, 2026). CoreCivic’s lockbox instructions cover deposits mailed to CoreCivic’s lockbox at P.O. Box 16545, Atlanta, GA 30321-0545, a route ICE’s facility page does not list:

• The instructions say money orders or cashier’s checks must be made payable to the person receiving the funds, and that personal checks and cash are not accepted.
• They say missing information on the envelope or money order may delay the deposit.
• They say letters, cards, pictures or packages must not be included with a lockbox payment, that nothing sent to the lockbox address is forwarded to the detainee or returned to the sender, and that other correspondence goes to the facility address.

The lockbox instructions allow cashier’s checks for the lockbox route; ICE’s prohibition on cashier’s checks in mail sent to the facility remains as described above.

Legal access, attorneys, and immigration court information

Detainees have the right to speak with an attorney, and attorney–client visits and calls are confidential. For information about a case before the immigration court (EOIR), EOIR’s automated line 1-800-898-7180 (toll-free, 24 hours a day, English and Spanish) gives the next hearing date and case status; callers enter the 9 digits of the A-number, without the letter A (EOIR, checked October 24, 2026). For a matter before the Board of Immigration Appeals (BIA), the main line of EOIR (the Justice Department agency the BIA belongs to) is (703) 305-0289. Applications for relief from removal must be filed directly with the immigration court handling the case. If you cannot afford an attorney, the immigration court can provide a list of pro bono legal service providers — see the related resources below.

Case information, the deportation officer, and G-28s

• Case-information requests for people held at Diamondback go to Dallas.Outreach@ice.dhs.gov. ICE notes this mailbox does not accept applications for a stay of removal or case appeals.
• To learn who the client’s Deportation Officer is, ICE points representatives to the Dallas Field Office and/or the facility through the same mailbox, Dallas.Outreach@ice.dhs.gov; a G-28 must be on file before anything is disclosed.
• G-28s can be submitted through ERO eFile. Facility staff do not have access to it, so bring a downloaded copy of the submitted G-28 to any in-person or remote legal visit.

Virtual attorney visits and legal calls (ERO eFile since March 16, 2026)

• Since March 16, 2026, all virtual attorney visitation (VAV) appointments and legal calls must be scheduled through ERO eFile, which sends the confirmation. Appointments run in 60-minute increments from 8 a.m. to 4 p.m. every day. Walk-in visits are still permitted.
• For video appointments, give the Zoom link, meeting ID and passcode in the Virtual Meeting Information section; for phone appointments, give your phone number.
• The request must give the representative’s full name and contact details, the detainee’s name and A-number (or name, date of birth and country of birth). Uploads: a scan of the representative’s government-issued ID; proof of active legal-representative status (such as a state bar card); and the ERO eFile G-28, unless the visit is pre-representational. A legal assistant joining alone also needs a letter of authorization on letterhead and a scan of the assistant’s ID.
• For a request under PBNDS 2011 Section 5.7 (V.N.1) and Section 4.3 (V.FF), ICE says to upload the written request in the Attorney Authorization Letter field and the professional licensure or curriculum vitae in the Medical/Mental Health Evaluators field.
• Appointments can be made up to 2 weeks ahead but no later than 24 hours before, first come first served. Each representative is limited to 2 hours of appointments per day; booking more may lead the facility to cancel. For a quick call, ICE recommends having the client call the representative instead.
• Only legal representatives, legal assistants and interpreters may attend. A visitation officer stays outside the room, out of earshot but within eyeshot, and knocks 5 minutes before the cut-off time.
• No slot available, or an emergency: email diamondbacklegal@corecivic.com or call (580) 614-2100, ext. 42225.
• CoreCivic’s attorney instructions differ. The undated Visitation Instructions for Attorneys PDF linked from CoreCivic’s page for this facility (read October 15, 2026) describes requests for virtual attorney visits, live meetings or confidential legal calls by email to Diamondbacklegal@corecivic.com, with a CoreCivic staff member confirming the date and time, or by phone to 580-614-2000 ext. 42225 (ICE prints (580) 614-2100). For virtual attorney visits (VAV), it says appointments must be made 24 hours ahead and are scheduled from 8 a.m. to 4 p.m. in 30- to 60-minute increments. ICE’s page describes ERO eFile scheduling since March 16, 2026; confirm the current channel with the facility before booking.

Sending legal documents to a detained client

When timely communication through the mail is not possible, the facility administrator may, at their discretion, allow a reasonable amount of electronic written communication between the detainee and their designated legal representative. ICE says legal representatives can send legal correspondence to diamondbacklegal@corecivic.com or by fax to (580) 614-2133. The subject line should make clear it is legal correspondence, the documents go as attachments, and a cover sheet should list the detainee’s full name, A-number, the sender’s return fax number, the total number of pages, and the notation “Legal Mail.” The documents are inspected for contraband but not read, then delivered. Requests are processed Monday through Friday, 8 a.m. to 4 p.m., excluding holidays.

Who runs the facility

CoreCivic’s page for this facility lists it as owned by CoreCivic since 1998 and managed by CoreCivic, with U.S. Immigration and Customs Enforcement as the government partner, and describes it as a multi-level security facility.

Feedback, complaints, and oversight

To report a concern about conditions at this facility or the conduct of an ICE or contract employee, contact the ERO Dallas Field Office that oversees this facility, or file a complaint with the DHS Office for Civil Rights and Civil Liberties (CRCL). On its own Make a Civil Rights Complaint page DHS publishes one channel — the online portal at engage.dhs.gov/crcl-complaint; CBP additionally publishes, for the same office, the e-mail address CRCL@dhs.gov, fax (202) 401-4708, and the postal address DHS/CRCL, Compliance Branch, 2707 Martin Luther King Jr Ave SE, Mail Stop #0190, Washington, DC 20528-0190. The DHS Office of Inspector General (OIG) hotline is 1-800-323-8603.

This facility’s own ICE page adds these channels:

• Comments on service: Assistant Field Office Director, Enforcement and Removal Operations, U.S. Immigration and Customs Enforcement, 8101 North Stemmons Freeway, Dallas, TX 75247. Misconduct complaints go to the Field Office Director at the same address.
• ICE Office of Professional Responsibility (by mail): Director, Office of Professional Responsibility, U.S. Immigration and Customs Enforcement, 500 12th Street, SW, Suite 1049, Mailstop 5099, Washington, DC 20536-5005.
• ICE OPR Integrity Coordination Center: 1-833-4ICE-OPR or ICEOPRIntake@ice.dhs.gov.
• DHS OIG: 1-800-323-8603 or DHSOIGHOTLINE@DHS.GOV.

A news reporter who wants to interview someone held here must apply in writing to the Dallas Field Office. ICE says a detainee has the right not to be interviewed, photographed or recorded, and the reporter must first obtain the detainee’s written permission.

ICE inspection record

As of September 24, 2026, ICE’s Office of Detention Oversight inspections page lists no inspection report for Diamondback Correctional Facility, and ICE’s third-party contractor inspection page, whose posted reports run through September 2022, lists none either. ICE’s FY2026 population and length-of-stay figures for this facility are in the statistics box above.

Related procedural resources

• Know Your Rights — what to do if ICE detains you
• EOIR immigration court schedules and procedures
• BIA-recognized legal-aid organizations in Oklahoma
• Other ICE detention facilities in Oklahoma
• All facilities under the Dallas Field Office