How to send mail to an inmate at Maplehurst Correctional Complex

To write to someone at Maplehurst Correctional Complex, address the envelope to the inmate's full name, c/o Maplehurst Correctional Complex, 661 Martin St, Box 10, Milton ON L9T 2Y3. Maplehurst Correctional Complex is a provincial correctional complex in Milton, Ontario, operated by Ontario's Ministry of the Solicitor General. Mail is inspected before delivery, and inmates can be transferred without notice — double-check the person is still there before you send.

Inmate mail — Maplehurst Correctional Complex

[Inmate's full name]
c/o Maplehurst Correctional Complex
661 Martin St, Box 10
Milton ON  L9T 2Y3
Send a letter to this address

Address verified July 2026 — double-check it against your form or notice before sending.

Mail it without printing anything

Upload your document — we print it, seal it, and deposit it with Canada Post within 24 hours on business days. $6 flat, no account needed, and you get a Confirmation of Mailing email for your records.

Send a letter to an inmate — $6

Key facts

  • Write the inmate's full name on the first line and "c/o Maplehurst Correctional Complex" below it — mail without a usable inmate name is returned or destroyed.
  • All incoming mail is opened and inspected for contraband; personal (non-privileged) mail can be read.
  • Do not enclose cash, gift cards, postage stamps, jewellery, or anything besides paper — prohibited enclosures are seized.
  • Inmates are transferred between facilities without notice. Confirm the person is still at Maplehurst Correctional Complex before mailing, and double-check the address against Ontario's Ministry of the Solicitor General's official listing.
  • Include your full return address so the person can write back — some facilities refuse mail without one.
  • PostPal prints and deposits your letter with Canada Post the next business day, so you can write from anywhere without a printer or stamps.

How to mail it, step by step

  1. 1

    Confirm the person is still at Maplehurst Correctional Complex

    Inmates move between facilities without notice — after sentencing, for security reclassification, or for programs. Confirm during a call or visit that they are still at Maplehurst Correctional Complex before you send anything, and double-check the mailing address against the official Ontario listing (linked in the sources below).

  2. 2

    Address it to the inmate, care of the facility

    First line: the inmate's full name (the name they are held under, not a nickname). Second line: c/o Maplehurst Correctional Complex. Then the mailing address: 661 Martin St, Box 10, Milton ON L9T 2Y3.

  3. 3

    Keep the contents to paper only

    A letter on plain paper is always safest. No cash, stamps, gift cards, stickers, glitter, perfume, or laminated items — facilities seize prohibited enclosures and may reject the whole letter. If you want to send photos or documents, call the facility first to confirm what it accepts.

  4. 4

    Send it without a trip to the post office

    Write or upload your letter to PostPal with the address above prefilled, and we print, envelope, and deposit it with Canada Post the next business day for $6 — with your return address printed so they can write back.

Common questions

How do I address a letter to an inmate at Maplehurst Correctional Complex?

Put the inmate's full name on the first line, "c/o Maplehurst Correctional Complex" on the second line, then the facility's mailing address: 661 Martin St, Box 10, Milton ON L9T 2Y3. Include your own return address so they can write back.

Is mail to Maplehurst Correctional Complex opened and read?

Expect it to be. Correctional facilities inspect incoming mail for contraband, and non-privileged personal mail can be read under Ontario's Ministry of the Solicitor General's rules. Never include cash, gift cards, stamps, or anything besides paper — unauthorized enclosures are confiscated and can get the letter rejected.

What happens if the person has been transferred or released?

The letter will not be forwarded to you or reliably to them. Inmates are moved between facilities without notice, so confirm the person is still at Maplehurst Correctional Complex — ideally during a phone call or visit — before mailing anything important.

Can the inmate write back to me?

Yes. Include a complete return address on your letter. Inmates in Ontario provincial custody can send outgoing personal mail, though they may need to cover their own postage.

Can I send photos or printed documents?

Plain paper letters and standard photo prints are generally accepted; polaroids, hard objects, and anything glued, taped, or perfumed usually are not. Rules vary by facility and change — call Maplehurst Correctional Complex to confirm before sending anything other than a plain letter.

Related mailing addresses

Sources

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