How to send mail to an inmate at Stony Mountain Institution

To write to someone at Stony Mountain Institution, address the envelope to the inmate's full name, c/o Stony Mountain Institution, PO Box 4500, Winnipeg MB R3C 3W8 — check the address blocks below, because different units at this facility use different mailing addresses. Stony Mountain Institution is a multi-level federal institution in Stony Mountain, Manitoba, operated by Correctional Service Canada. Mail is inspected before delivery, and inmates can be transferred without notice — double-check the person is still there before you send.

Maximum- and medium-security sites

[Inmate's full name]
c/o Stony Mountain Institution
PO Box 4500
Winnipeg MB  R3C 3W8

The facility itself is located at Highway 7, Stony Mountain — but use the mailing address above for letters.

Send a letter to this address

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

Minimum-security site

[Inmate's full name]
c/o Stony Mountain Institution
PO Box 72
Stony Mountain MB  R0C 3A0

The facility itself is located at Highway 7 — but use the mailing address above for letters.

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 Stony Mountain Institution" 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 Stony Mountain Institution before mailing, and double-check the address against Correctional Service Canada'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 Stony Mountain Institution

    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 Stony Mountain Institution before you send anything, and double-check the mailing address against the official Federal (CSC) 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 Stony Mountain Institution. Then the mailing address: PO Box 4500, Winnipeg MB R3C 3W8. If you know which unit or security level the person is in, use that unit’s address block above.

  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 Stony Mountain Institution?

Put the inmate's full name on the first line, "c/o Stony Mountain Institution" on the second line, then the facility's mailing address: PO Box 4500, Winnipeg MB R3C 3W8. Include your own return address so they can write back.

Is mail to Stony Mountain Institution opened and read?

Expect it to be. Correctional facilities inspect incoming mail for contraband, and non-privileged personal mail can be read under Correctional Service Canada'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 Stony Mountain Institution — 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 federal institutions 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 Stony Mountain Institution 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.