Indiana inmate mail
Send a letter to an inmate in Indiana
Confirm the Indiana facility and DOC number before writing online. PieterPost formats, prints, adds the envelope and postage, and mails your physical letter to the Phoenix, Maryland route used by most facilities.
Choose their Indiana facilityIndiana state-prison addresses
Use the Indiana general-correspondence route
Indiana's new general-correspondence route began July 1, 2026. Most facilities use the Phoenix, Maryland processing box, but Reception Diagnostic Center is an explicit exception and follows its own current instructions.
Mail sent to the wrong location after the July 31, 2026 transition return deadline is returned. Legal and privileged mail, packages, and parcels still go directly to the facility.
Indiana General Correspondence Processing
Incarcerated individual full name – DOC numberFacility nameP.O. Box 460Phoenix, MD 21131Three simple steps
How to send a letter to an inmate in Indiana
Choose the current facility and add the inmate's DOC number. We help you carry the address into the letter flow.
- 1Choose their current facility
- 2Write and review your message
- 3We print, stamp, and mail it
Current Indiana guidance
Helpful inmate-mail rules
- Letter length
- No universal page cap is published; keep pages scan-ready and check before sending an unusually large letter
- Paper format
- Use plain paper and dark ink for a readable full-color scan
- Envelope and address
- Include the full name, DOC number, facility name, and sender return address; most facilities use Phoenix, Maryland
- How it arrives
- Mail is scanned for tablet access, with other access when needed; originals are kept 30 days and discarded
Items that need another approved route
PieterPost is for ordinary written letters. To help avoid a mailroom rejection, do not add these items to the envelope:
- Polaroids or irreplaceable original photographs and documents
- Cards with electronics, music, pop-ups, glitter, stickers, or glued pieces
- Loose objects, layered material, or decoration that cannot be scanned flat
- Cash, checks, stamps, gift cards, or other loose valuables
PieterPost takes care of the rest
You only need to write your message
No printer, paper, envelope, stamp, or trip to the post office. We prepare and mail the physical letter for you.
- Write your letter online from any device
- Check the finished letter before paying
- We format and print it for the facility
- We address, stamp, and mail the envelope
Indiana facility finder
Find their prison or local jail
Choose the current facility on the map. We will carry the selected address into the letter flow for you to review.
Is the person in federal prison?
Search the Bureau of Prisons inmate locator and continue with the federal letter flow.
Common questions
How do I send a letter to someone in Indiana state prison?
Confirm the person's DOC number and current facility, then write online. For most facilities, PieterPost formats and prints the letter, adds the envelope and postage, and mails it to the Phoenix, Maryland processor.
Which address should I use for Indiana general correspondence?
For most facilities, use the full name and DOC number, facility name, P.O. Box 460, Phoenix, MD 21131. Reception Diagnostic Center is an explicit exception, so check its current facility instructions instead.
How do I find the DOC number and current facility?
Use Indiana's incarcerated-individual locator to confirm the DOC number and current facility. The facility name belongs in the processing address and also tells you whether the Reception Diagnostic Center exception applies.
What changed in Indiana in July 2026?
The new route began July 1, 2026, and mail sent to the wrong location after July 31, 2026 is returned. Accepted mail is scanned in full color for tablet access, with kiosk, loaner-tablet, or printed access when needed. Originals are retained for 30 days and then discarded.
Does this guide apply to Indiana jails or federal prisons?
No. This page covers adults in Indiana Department of Correction state prisons. County or city jails, federal prisons, juvenile facilities, and other custody systems may use different mail routes.