How to mail a letter to an inmate at Kulani Correctional Facility
To write to someone held at Kulani Correctional Facility, address your envelope to the inmate's full committed name and SID number, Kulani Correctional Facility, P.O. Box 4459, Hilo, HI 96720. Kulani Correctional Facility is a state prison in Hilo, Hawaii, operated by the Hawaii Department of Corrections and Rehabilitation.
Inmate mail — Kulani Correctional Facility
[Inmate's full committed name] [SID number] Kulani Correctional Facility P.O. Box 4459 Hilo, HI 96720
Put the inmate's full committed name and SID 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 SID number is returned.
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Your name
Your return address
Kulani Correctional FacilityP.O. Box 4459Hilo, HI 96720
Your letter, printed and mailed for you.
Key facts
- Send mail to Kulani Correctional Facility, P.O. Box 4459, Hilo, HI 96720 — the institution's inmate-mail address, not its street address.
- Hawaii sends mail to each facility directly. Address it to the incarcerated person’s full name and SID (State Identification) number, then the facility’s own address.
- Include your full name and return address. Mail without the SID number can be delayed — call the facility if you don’t have it.
- Incoming mail is screened for drugs (the DCR uses scanners that detect contraband without opening the envelope) and inspected before delivery.
- Confirm the person’s current facility before mailing — Hawaii also houses some people at the Saguaro Correctional Center in Arizona, which has a separate address.
- 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
Confirm the person is still at Kulani Correctional Facility
Inmates are transferred between facilities without notice. Confirm they are still at Kulani Correctional Facility — and double-check the SID number — before you mail anything, using the Hawaii Department of Corrections and Rehabilitation (DCR)'s official inmate locator.
- 2
Address it exactly
First line: the inmate's full committed name and SID number. Then Kulani Correctional Facility, P.O. Box 4459, Hilo, HI 96720. Add your full return address.
- 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
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 Kulani Correctional Facility?
Put the inmate's full committed name and SID number on the first line, then Kulani Correctional Facility, P.O. Box 4459, Hilo, HI 96720. Include your full first and last name and return address on the envelope.
Is mail to Kulani Correctional Facility opened, read, or scanned?
Expect it to be. Incoming personal mail is opened and inspected for contraband and can be read under the Hawaii Department of Corrections and Rehabilitation (DCR)'s rules.
What can I send to Kulani Correctional Facility — 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 a publisher or approved vendor, not in personal mail.
What can't I mail to Kulani Correctional Facility?
Do not send: Cash, checks, money orders, or postage stamps; Any item other than paper (no polaroids, laminated items, or enclosures); Nude, sexually explicit, or contraband-promoting content; Stickers, glitter, glue, tape, perfume, lipstick, or crayon/marker; Paper treated with any substance or drug residue. 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 Kulani Correctional Facility before mailing, since the Hawaii Department of Corrections and Rehabilitation (DCR) 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 Hawaii inmate mail rules — what you can and can’t send, photos & more →