Idaho inmate mail
Send a letter to an inmate in Idaho
Idaho personal letters go to the resident's current IDOC facility. Confirm the IDOC number, unit, and address, then PieterPost can print and mail your letter.
Choose their Idaho facilityIdaho state-prison addresses
Idaho facility-specific address format
Idaho personal mail goes to the resident's current facility. The published Boise P.O. boxes do not cover every IDOC institution.
Use the facility page for PWCC, ICIO, NICI, and SAWC rather than a Boise P.O. box. Residents in an out-of-state contract facility can also have a different address.
Address format
Three simple steps
How to send a letter to an inmate in Idaho
Choose the current facility and add the inmate's IDOC 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 Idaho guidance
Helpful inmate-mail rules
- Letter length
- IDOC publishes no statewide page limit for ordinary letters. Institution and property limits can apply, so check before sending an unusually long letter.
- Paper format
- Use flat, readable paper. Personal mail is inspected, so avoid adhesives, stickers, and layered material.
- Envelope and address
- Put the resident's last name and IDOC number on the first line, then the facility and unit number. Include your complete return address.
- How it arrives
- Accepted correspondence is processed at the resident's current Idaho institution rather than a statewide off-site center.
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:
- Cash, checks, stamps, gift cards, or other valuables
- Stickers, glitter, perfume, adhesives, or decorative substances
- Polaroids, explicit images, or altered and layered prints
- Glued objects, unapproved attachments, or bulky material the mailroom must dismantle
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
Idaho 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 an Idaho state prison?
Confirm the resident's IDOC number, facility, unit, and correspondence address. Write online and PieterPost will format and print your letter, add the envelope and postage, and mail the physical letter.
Which Idaho prison mailing address should I use?
Use the address for the resident's current institution. Boise-area facilities use specific P.O. boxes, while PWCC, ICIO, NICI, and SAWC require the address shown on their facility pages.
How do I find an Idaho resident's IDOC number and facility?
Use the IDOC resident search to confirm the IDOC number and current location, then open the matching facility page. Recheck the details after a transfer.
How many pages can I send to an Idaho prison?
IDOC does not publish one statewide page limit for an ordinary letter. Institution and property limits can still apply, so check before sending an unusually long letter.
Does this Idaho guidance cover local and federal facilities?
No. This guidance covers adults in Idaho Department of Correction state prisons. County jails, federal facilities, juvenile custody, contract facilities, and community programs may use different rules.