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

To write to someone held at Spokane County Jail, address the envelope to the inmate's full name and booking number, c/o Spokane County Detention Services, 1100 West Mallon Avenue, Spokane, WA 99260-0320. Spokane County Jail is the jail for Spokane County, Washington, run by Spokane County Detention Services. 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 — Spokane County Jail

[Inmate's full name]  [booking number]
c/o Spokane County Detention Services
1100 West Mallon Avenue
Spokane, WA  99260-0320

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 August 2026spokanecounty.gov

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Your name
Your return address

c/o Spokane County Detention Services1100 West Mallon AvenueSpokane, WA 99260-0320

Your letter, printed and mailed for you.

Key facts

  • Send mail to c/o Spokane County Detention Services, 1100 West Mallon Avenue, Spokane, WA 99260-0320 — 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.
  • Incoming mail is opened, inspected, and photocopied — the inmate receives a copy, not your original. Send copies of anything you want to keep.
  • Do not enclose cash, checks, gift cards, or anything other than paper — prohibited items get the whole letter rejected.
  • Incoming mail is photocopied in black and white; the inmate gets the copy and the original goes to their property.
  • No postcards, greeting cards, or greeting-card envelopes.
  • Use blue or black ink — no felt markers or crayons.
  • No stickers, tape, perfume, or stains on the envelope.
  • 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 Spokane County Detention Services's online inmate roster to confirm they're still at Spokane 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 c/o Spokane County Detention Services, 1100 West Mallon Avenue, Spokane, WA 99260-0320. 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. Incoming mail is photocopied in black and white; the inmate gets the copy and the original goes to their property. 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 Spokane County Jail?

Put the inmate's full name and booking number on the first line, then c/o Spokane County Detention Services, 1100 West Mallon Avenue, Spokane, WA 99260-0320. Include your full return address in the top-left corner of the envelope.

Is mail to Spokane County Jail opened or read?

Yes. Incoming mail is opened, inspected, and photocopied — the inmate gets the copy, and your original is kept in their property or discarded. 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 Spokane County Detention Services's inmate roster to confirm they're still at Spokane County Jail before you send.

What can I send to Spokane County Jail?

Incoming mail is photocopied in black and white; the inmate gets the copy and the original goes to their property. No postcards, greeting cards, or greeting-card envelopes. Use blue or black ink — no felt markers or crayons. No stickers, tape, perfume, or stains on the envelope. 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 August 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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