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How to send a letter to an inmate at Kendall County Corrections

To write to someone held at Kendall County Corrections, address the envelope to the inmate's full name and inmate ID number, Kendall County Corrections, 1102 Cornell Ln, Yorkville, IL 60560. Kendall County Corrections is the jail for Kendall County, Illinois, run by the Kendall 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 — Kendall County Corrections

[Inmate's full name]  [inmate ID number]
Kendall County Corrections
1102 Cornell Ln
Yorkville, IL  60560

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 2026kendallcountyil.gov

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Your name
Your return address

Kendall County Corrections1102 Cornell LnYorkville, IL 60560

Your letter, printed and mailed for you.

Key facts

  • Send mail to Kendall County Corrections, 1102 Cornell Ln, Yorkville, IL 60560 — 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.
  • Blue or black ink only; no felt markers, crayons, drawings, glitter, or confetti.
  • Only authorized newspapers (WSJ, Washington Post, NYT, USA Today) and magazines are accepted, direct from the publisher.
  • Packages must come from the approved vendor on the commissary page.
  • 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 Kendall County Sheriff's Office's online inmate roster to confirm they're still at Kendall County Corrections — 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 Kendall County Corrections, 1102 Cornell Ln, Yorkville, IL 60560. 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. Blue or black ink only; no felt markers, crayons, drawings, glitter, or confetti. 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 Kendall County Corrections?

Put the inmate's full name and inmate ID number on the first line, then Kendall County Corrections, 1102 Cornell Ln, Yorkville, IL 60560. Include your full return address in the top-left corner of the envelope.

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

What can I send to Kendall County Corrections?

Blue or black ink only; no felt markers, crayons, drawings, glitter, or confetti. Only authorized newspapers (WSJ, Washington Post, NYT, USA Today) and magazines are accepted, direct from the publisher. Packages must come from the approved vendor on the commissary page. 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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