The mailroom and the front door here are ten street numbers apart on the same road, and both appear on county material. Send letters and photos in minutes.
Send letters and photos in minutes
Riverhead is the one Suffolk facility where the mailing address and the building are on the same road, which makes this the easier of the two jails to write to and also the easier one to get subtly wrong. The county’s rules underneath are specific and worth reading before you seal anything, particularly the size limits on photographs.
C/O [Full Legal Name]
Suffolk County Correctional Facility
110 Center Drive South
Riverhead, NY 11901
The facility is at 100 Center Drive South. Mail goes to 110. Both numbers appear on Suffolk County material, both are correct for their own purpose, and a letter addressed to 100 is addressed to a building rather than a mailroom.
Where the name is a common one, the county advises adding a date of birth so that post reaches the right person.
This single address also covers Yaphank, which has none of its own. So if you are writing to someone and are not certain which of the two jails holds them, the address is the same either way. That is the one part of the Suffolk process where the two-jail problem does not bite.
Suffolk publishes a specific list:
A standard photo print passes. An enlargement does not.
The mail rules govern what gets through the door. The property rules govern what somebody may keep, and they are a different set of numbers.
| Item | How many at once |
|---|---|
| Photographs, five by seven maximum | 15 |
| Paperback books | 5 |
| Magazines | 5 |
| Current newspapers | 2 |
| Prayer rug | 1 |
| Single layer black or white kuffi | 1 |
| Plain wedding band | 1 |
So sending twenty photographs is not useful even if every one of them meets the size rule. Fifteen is the ceiling on what can be held.
Clothing must have no pockets and no drawstrings, in hunter green or white. The county defines hunter green by comparison to a New York Jets football jersey, which is a more practical description than any colour name would be.
Books, magazines and newspapers must come direct from a publisher or a reputable online vendor, and the county names Amazon and Barnes and Noble as examples. That is a broader rule than the publisher-only policies many jails run.
What changed, in the county’s own words: items brought in by visitors or sent through the mail will no longer be accepted. Buying a paperback and posting it yourself does not work. Ordering the same paperback shipped directly does.
Hardcover books need the cover removed, and the property cap is five paperbacks at a time.
Suffolk names one electronic mail service and links it from its own site, through a county-specific portal.
The published prices are 1 dollar 19 per photograph and 60 cents per letter page, with no refunds.
It is a print-at-facility service rather than a scanning one. The vendor states that its software delivers mail inside correctional facilities without a scanning, photocopying or third party handling step, and that photographs print on genuine four by six photo paper. Your person receives a print, not an image on a screen.
The fifteen photograph property cap applies to anything sent this way as well.
What Pigeonly adds. Pigeonly lets you write a letter or pick photos on your phone and we print and post them to Suffolk under the county’s rules, without a printer, envelopes or stamps at your end, and without having to remember that the mail number is 110 and not 100. It goes by post, which is the accurate description: we are not printing inside the facility the way the county’s own service does.
Suffolk County publishes nothing about how legal or certified mail is handled. We checked the Sheriff’s full 80 page site index and it is not there, for either jail.
Confirm the procedure on 631-852-2241 before sending anything time sensitive.
Two direct answers.
There is no third party scanning vendor. No digital mail processor appears anywhere in county material or contracts. What you post goes to Suffolk County.
The address is Suffolk’s own, not a processing centre in another state. No claim about saved transit time applies here, because there is no transit stage to skip.
6 of 9 questions
Care of the person's full legal name, Suffolk County Correctional Facility, 110 Center Drive South, Riverhead, NY 11901. Note that the facility itself is at 100 Center Drive South. Ten numbers separate the mailroom from the front door, and both appear on county material.
Mail & PhotosYes. Suffolk publishes one inmate mailing address covering both of its jails, and this is it. Yaphank has none of its own. So if you are unsure which building holds your person, the letter goes to the same place either way, which is the one part of Suffolk's two-jail arrangement that makes life easier.
Mail & PhotosMost likely the envelope colour. Suffolk accepts white envelopes only, and greeting cards often come with coloured ones. The other common causes are a card larger than six by nine inches, enclosed stamps, or stickers on the envelope.
Mail & PhotosNothing larger than five inches by seven. Polaroids are prohibited outright whatever the size. Separately, a person may only hold fifteen photographs in property at a time, so a large batch can hit that ceiling even when every print is within the size limit.
Mail & PhotosOnly shipped direct from a publisher or a reputable online vendor, and the county names Amazon and Barnes and Noble as examples. Buying a book and posting it yourself does not work: the county states that items sent through the mail or brought by visitors are no longer accepted. Hardcovers need the cover removed, and the property cap is five paperbacks.
Mail & PhotosClothing with no pockets and no drawstrings, in hunter green or white. Suffolk defines hunter green in its own material by comparison to a New York Jets football jersey. Property also allows one prayer rug, one single layer black or white kuffi and one plain wedding band.
Mail & PhotosYes. Suffolk names one electronic mail service and links it from its own site: 1 dollar 19 per photograph, 60 cents per letter page, no refunds. It prints inside the facility rather than scanning, so photographs arrive as real four by six prints. The fifteen photograph property cap still applies to them.
Mail & PhotosNo scanning vendor is involved. No digital mail processor appears in Suffolk County material or contracts, and the electronic service the county does name prints inside the facility rather than scanning. What you post goes to the county directly.
Mail & PhotosSuffolk County does not publish a procedure for it. We checked the Sheriff's full 80 page site index and found nothing on legal or certified mail for either jail. Confirm on 631-852-2241 before sending anything time sensitive rather than assuming the ordinary rules apply.
Mail & PhotosMoney orders go to the mail address, bail goes to the building.
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All information on this page comes directly from official government and facility sources. How we verify information › Last verified September 17, 2026. Official source: suffolkcountysheriffsoffice.com/inmate-mail-phone-and-resources ›