How to Address Mail to Knox County Detention Center (Which Address to Use and How to Format It)

The right address and a clean, complete envelope are the difference between your letter getting delivered and getting sent back. Here are the exact addresses and formatting rules for Knox County Detention Center.

3 min read Verified from official sources

For regular friends and family letters (not legal mail), use the Knox County Detention Center P.O. Box address. This is the one most people need for everyday mail. Copy and paste this format: Inmate Name - Inmate ID Knox County Detention Center P.O. Box 76550 Highland Heights, KY 41076

Mail from lawyers or other legal representation goes to the physical facility address, not the P.O. Box. Copy and paste this format: Inmate Name - Inmate ID Knox County Detention Center 570 KY 225 Barbourville, KY 40906

Sending a money order for commissary? Make it payable to "Knox County Detention Center" and write the inmate's name on the memo line so staff can match it to the right account. Mail these payments to the physical address: Knox County Detention Center, 570 KY 225, Barbourville, KY 40906.

For an MRT book payment, the money order is still made out to "Knox County Detention Center." The memo line needs to be specific, though. Write the inmate's name plus "MRT Book" (for example: "Jane Doe - MRT Book"). Send these to the physical mailing address: Knox County Detention Center, 570 KY 225, Barbourville, KY 40906.

How to Write Envelope

  • Inmate’s full name
  • Inmate ID
  • Your return address (on the envelope)

Here's a copyable example with all the required fields (using the friends and family P.O. Box address): [Your Full Name] [Your Street Address] [City, State ZIP] Inmate Full Name - Inmate ID Knox County Detention Center P.O. Box 76550 Highland Heights, KY 41076

Warning: Mail that isn't addressed correctly, or that doesn't meet facility guidelines, can be rejected or destroyed. Before you send anything, double-check the inmate ID, your return address, and that you used the correct address (P.O. Box vs. physical).

Quick Tips Final Checklist

  • Use the P.O. Box address for standard friends and family mail, and the 570 KY 225 address for legal mail
  • Put the inmate’s full name and inmate ID on the address
  • Add a clear return address on the envelope
  • Keep mail within the size limits: no larger than 8 1/2" x 11" and no smaller than 3 1/2" x 5"
  • Avoid thick or bulky items; mail must be no thicker than light card stock and able to go through a sheet-fed scanner
  • Do not include or attach address labels or stickers
  • Skip homemade or musical cards, non-white envelopes or paper, and anything with raised decorations
  • Do not send paintings, tracing paper, coloring-book pages, or colored drawings (marker, crayon, glitter)
  • Do not use paint, white-out, glue, or any other liquid on incoming mail

Payments reminder: Money orders must be made out to "Knox County Detention Center." Use the memo line to label it correctly: the inmate's name for commissary, or "inmate name - MRT Book" for MRT book payments.

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