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How to send a letter to an inmate at Idaho County Jail

To write to someone held at Idaho County Jail, address the envelope to the inmate's full name and booking number, Idaho County Jail, 320 W Main St, Grangeville, ID 83530. Idaho County Jail is the jail for Idaho County, Idaho, run by the Idaho County Sheriff's Office. Mail is opened and inspected — include your full return address, and double-check the person is still in custody, since people are released or moved from a county jail quickly.

Inmate mail — Idaho County Jail

[Inmate's full name]  [booking number]
Idaho County Jail
320 W Main St
Grangeville, ID  83530

Put the inmate's full name and booking number on the first line, and your full return address in the corner — mail without either is usually rejected.

Verified September 2026idahocounty.org

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Your name
Your return address

Idaho County Jail320 W Main StGrangeville, ID 83530

Your letter, printed and mailed for you.

Key facts

  • Send mail to Idaho County Jail, 320 W Main St, Grangeville, ID 83530 — the jail's own mailroom.
  • Write the inmate's full name and booking number on the envelope, plus your full return address, or the letter is returned.
  • All incoming mail is opened and inspected for contraband before it reaches the inmate.
  • Do not enclose cash, checks, gift cards, or anything other than paper — prohibited items get the whole letter rejected.
  • The envelope must show both the sender's and inmate's full names and addresses, or it will not be delivered.
  • Books, magazines, and newspapers are not accepted by mail.
  • Legal mail is opened in the inmate's presence to protect attorney-client confidentiality.
  • County jails move fast — people are released, bailed out, or transferred within days. Confirm the person is still in custody before mailing anything time-sensitive.
  • PostPal prints and mails your letter for you the next business day for $5 — with your return address printed so they can write back, and no printer, envelope, or stamp needed.

How to send your letter

  1. 1

    Confirm the person is still at the jail

    County-jail populations turn over quickly. Check the Idaho County Sheriff's Office's online inmate roster to confirm they're still at Idaho County Jail — and get their booking number — before you mail anything.

  2. 2

    Address it correctly

    First line: the inmate's full name and booking number. Then Idaho County Jail, 320 W Main St, Grangeville, ID 83530. Add your full return address in the top-left corner.

  3. 3

    Keep the contents allowed

    A plain letter on white paper is always safest. The envelope must show both the sender's and inmate's full names and addresses, or it will not be delivered. No cash, gift cards, or any object other than paper.

  4. 4

    Send it without a printer

    Write or upload your letter in PostPal with this address prefilled, and we print, envelope, and mail it via USPS the next business day for $5 — your return address printed so they can reply.

Common questions

How do I address a letter to an inmate at Idaho County Jail?

Put the inmate's full name and booking number on the first line, then Idaho County Jail, 320 W Main St, Grangeville, ID 83530. Include your full return address in the top-left corner of the envelope.

Is mail to Idaho County Jail opened or read?

Yes. All incoming mail is opened and inspected for contraband before delivery, and non-legal mail can be read.

What if they've been released or moved?

It happens fast at a county jail — people bond out or transfer within days, and the letter won't be forwarded. Check the Idaho County Sheriff's Office's inmate roster to confirm they're still at Idaho County Jail before you send.

What can I send to Idaho County Jail?

The envelope must show both the sender's and inmate's full names and addresses, or it will not be delivered. Books, magazines, and newspapers are not accepted by mail. Legal mail is opened in the inmate's presence to protect attorney-client confidentiality. When in doubt, a plain letter on white paper is always accepted.

Can the inmate write back to me?

Yes, if you include a complete return address. PostPal prints your return address on the letter for you.

Sources

Addresses verified September 2026 against official sources. Always confirm on the official site before time-sensitive filings.

See the full US county & city jails rules — what you can and can’t send, photos & more →

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