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How to mail a letter to an inmate at Four Mile Correctional Center

To write to someone held at Four Mile Correctional Center, address your envelope to the inmate's full committed name and DOC number, Four Mile Correctional Center, P.O. Box 300, Cañon City, CO 81215-0300. Four Mile Correctional Center is a state prison in Cañon City, Colorado, operated by the Colorado Department of Corrections.

Inmate mail — Four Mile Correctional Center

[Inmate's full committed name]  [DOC number]
Four Mile Correctional Center
P.O. Box 300
Cañon City, CO  81215-0300

Put the inmate's full committed name and DOC number on the first line, and mail to the institution's inmate-mail address here — not its street address. Mail without a usable name and DOC number is returned.

Verified August 2026cdoc.colorado.govcdoc.colorado.gov

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Your name
Your return address

Four Mile Correctional CenterP.O. Box 300Cañon City, CO 81215-0300

Your letter, printed and mailed for you.

Key facts

  • Send mail to Four Mile Correctional Center, P.O. Box 300, Cañon City, CO 81215-0300 — the institution's inmate-mail address, not its street address.
  • Colorado sends mail to each facility directly. Address it to the incarcerated person’s full name and DOC number, then the facility’s own mailing address (a P.O. box for most, a street address for some).
  • Include a valid return address. Mail without the DOC number or a return address can be rejected (governed by Administrative Regulation 300-38).
  • Incoming mail is opened and inspected for contraband; generally only letters and photos are accepted — no packages or enclosed items.
  • Confirm the person’s current facility on CDOC’s inmate locator before mailing — people are transferred without notice, and several Cañon City and Pueblo facilities share a mailroom, so the facility name on the envelope matters.
  • PostPal prints and mails your letter for you the next business day for $5 — with your return address printed so the inmate can write back, and no printer, envelope, or stamp needed.

How to send your letter

  1. 1

    Confirm the person is still at Four Mile Correctional Center

    Inmates are transferred between facilities without notice. Confirm they are still at Four Mile Correctional Center — and double-check the DOC number — before you mail anything, using the Colorado Department of Corrections (CDOC)'s official inmate locator.

  2. 2

    Address it exactly

    First line: the inmate's full committed name and DOC number. Then Four Mile Correctional Center, P.O. Box 300, Cañon City, CO 81215-0300. Add your full return address.

  3. 3

    Keep the contents allowed

    Plain letter-size paper is safest. Do not enclose cash, stamps, gift cards, or any object other than paper — prohibited items get the whole letter rejected. Check the mail rules above before adding photos.

  4. 4

    Send it without a printer

    Write or upload your letter to 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 Four Mile Correctional Center?

Put the inmate's full committed name and DOC number on the first line, then Four Mile Correctional Center, P.O. Box 300, Cañon City, CO 81215-0300. Include your full first and last name and return address on the envelope.

Is mail to Four Mile Correctional Center opened, read, or scanned?

Expect it to be. Incoming personal mail is opened and inspected for contraband and can be read under the Colorado Department of Corrections (CDOC)'s rules.

What can I send to Four Mile Correctional Center — photos, cards, or books?

Photos are generally allowed; no polaroids or laminated photos, and nothing nude or sexually explicit. Books and magazines must come directly from an approved publisher or vendor (per AR 300-26), not in personal mail.

What can't I mail to Four Mile Correctional Center?

Do not send: Cash, checks, money orders, or postage stamps; Anything other than paper letters and photos (no packages or enclosures); Nude, sexually explicit, or contraband-promoting content; Stickers, glitter, glue, tape, perfume, lipstick, or crayon/marker; Polaroids or laminated items. Prohibited items get the letter rejected or destroyed.

What if the person has been transferred or released?

The letter will not reliably reach them or come back to you. Confirm they are still at Four Mile Correctional Center before mailing, since the Colorado Department of Corrections (CDOC) moves people without notice.

Can the inmate write back to me?

Yes, if you include a complete return address. Inmates can send outgoing mail, though they may need to cover their own postage. PostPal prints your return address for you.

Sources

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

See the full Colorado inmate mail rules — what you can and can’t send, photos & more →

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