New York's largest maximum security prison, at Dannemora in the Adirondacks, built in 1845 on the site of an old iron mine. It visits every day of the year, and the address to write to is one digit away from the address the prison uses for itself.
City
Dannemora
County
Clinton County
State
NY
Facility Type
state prison
Gender
Adult male
Capacity
1,969 per the Village of Dannemora
Custody Levels
Maximum
Operator
New York State Department of Corrections and Community Supervision
Address
1156 Route 374, Dannemora, NY 12929-2000
Phone
518-492-2511
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The prison is Box 2000. Letters are Box 2001. One digit decides it.
View ArticleDaily visiting including holidays, with three units closing half an hour early.
View ArticleA state prison, a county jail fifteen miles off, and one in Pennsylvania.
View ArticleFree by post if you plan ahead, or pay a fee to skip the wait.
View ArticleCalls went free across New York in August 2025 and need no account.
View ArticleLetters go to P.O. Box 2001 in Dannemora. The prison's own address carries P.O. Box 2000, a single digit away, and that is the box a business writes to rather than the one that reaches a person. Mail is opened and inspected at the prison and the paper is handed over, so what you wrote is what they hold.
See the full breakdownEvery day, 8:30 AM to 3:00 PM, arriving by 2:00 PM, weekday holidays included. Weekend days are split by last name, A to M and N to Z. One visit per day, three visitors plus a child under five on a lap. APPU, the Special Housing Unit and Long-Term Protective Custody close at 2:30 PM instead, which is the detail most likely to cost someone the end of a visit.
See the full breakdownOne statewide tool covers every New York state prison and returns a DIN. The care needed here is with the name: a state prison at Dannemora, a county jail in Plattsburgh fifteen miles away, and a Clinton County correctional facility in Pennsylvania all answer to some version of the same words.
See the full breakdownJPay handles deposits for the whole state from a lockbox in Miami. A money order posted with a deposit slip is free and caps at $999.99 a transaction, and the visitor lockbox at the prison takes up to $50 cash per person per day. Nothing is processed at Dannemora itself.
See the full breakdownFree since August 1, 2025, with no account for a family to open or fund. Three calls of up to fifteen minutes credited every Saturday, thirty minutes on anything after that, between 7:00 AM and 11:00 PM, across fifteen numbers the person inside manages. Useful here, because Dannemora is a long way from most of New York.
See the full breakdown6 of 9 questions
P.O. Box 2001, Dannemora, NY 12929, with their full name and DIN on the envelope and your return address in the top left. The prison's own address uses P.O. Box 2000, one digit away, and that box is for the facility rather than for a person in custody.
Mail & PhotosDaily, 8:30 AM to 3:00 PM, with the latest arrival at 2:00 PM. Clinton is one of only three New York state prisons that visit every day including weekday holidays. Weekdays are open to all, and each weekend day belongs to last names A to M or N to Z. Someone in APPU, the Special Housing Unit or Long-Term Protective Custody follows a shorter day, closing at 2:30 PM.
VisitationThe Assessment and Program Preparation Unit. New York's own regulations name it and place it at Clinton specifically, so it is not a general unit type found across the system. Visits to APPU, the Special Housing Unit and Long-Term Protective Custody all close at 2:30 PM rather than 3:00 PM.
VisitationThree visitors plus one child under the age of five, with the child sitting on an adult's lap. Each person may have one visit per day.
VisitationNo. Clinton Correctional Facility is a New York state prison at Dannemora on 518-492-2511. Clinton County Jail is run by the Sheriff at 25 McCarthy Drive, Plattsburgh, on 518-565-4300, about fifteen miles away in the same county. Mail, money and visiting work differently at each.
Inmate SearchRoute 374. Both DOCCS and the Village of Dannemora, the prison's host municipality, give 1156 Route 374. Map and review listings showing 1156 Cook Street are not correct.
Mail & PhotosNothing. New York made every call from a state prison free to families on August 1, 2025. Three calls of up to fifteen minutes are credited each Saturday, calls after those run to thirty minutes, and the window is 7:00 AM to 11:00 PM across fifteen approved numbers.
Phone CallsTo the JPay lockbox at PO Box 531190, Miami, Florida 33153, with a deposit slip, free by post and capped at $999.99 a transaction. There is also a visitor lockbox at the prison taking up to $50 cash per person per day. Money never goes in the envelope.
Send MoneyIf the visiting room fills, yes, and there is a published order. Volunteers are asked first, then visitors living within 100 miles are ended after three hours on a first in first out basis, then people who travelled further. Anyone visiting someone who has not had a visit in six months is considered separately by the Superintendent or Officer of the Day.
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All information on this page comes directly from official government and facility sources. How we verify information › Last verified September 23, 2026. Official source: doccs.ny.gov/location/clinton-correctional-facility ›