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

To write to someone held at DuPage County Jail, address the envelope to the inmate's full name and inmate ID number, DuPage County Jail, PO Box 957, Wheaton, IL 60187. DuPage County Jail is the jail for DuPage County, Illinois, run by the DuPage 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 — DuPage County Jail

[Inmate's full name]  [inmate ID number]
DuPage County Jail
PO Box 957
Wheaton, IL  60187

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

Verified September 2026jailexchange.com

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Your name
Your return address

DuPage County JailPO Box 957Wheaton, IL 60187

Your letter, printed and mailed for you.

Key facts

  • Send mail to DuPage County Jail, PO Box 957, Wheaton, IL 60187 — the jail's own mailroom.
  • Write the inmate's full name and inmate ID 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.
  • Postcards and letters should be written in blue or black ink.
  • Newspapers and magazines must be shipped directly from the publisher.
  • Books are accepted directly from Amazon, Barnes & Noble, or Books-A-Million.
  • 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 DuPage County Sheriff's Office's online inmate roster to confirm they're still at DuPage County Jail — and get their inmate ID number — before you mail anything.

  2. 2

    Address it correctly

    First line: the inmate's full name and inmate ID number. Then DuPage County Jail, PO Box 957, Wheaton, IL 60187. 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. Postcards and letters should be written in blue or black ink. 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 DuPage County Jail?

Put the inmate's full name and inmate ID number on the first line, then DuPage County Jail, PO Box 957, Wheaton, IL 60187. Include your full return address in the top-left corner of the envelope.

Is mail to DuPage 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 DuPage County Sheriff's Office's inmate roster to confirm they're still at DuPage County Jail before you send.

What can I send to DuPage County Jail?

Postcards and letters should be written in blue or black ink. Newspapers and magazines must be shipped directly from the publisher. Books are accepted directly from Amazon, Barnes & Noble, or Books-A-Million. 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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