United States · California · Atwater
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Usp Atwater is a federal prison located in Merced County, California. Rated capacity: 880. Reported population: 1,104. Security level: Maximum. Data sourced from the HIFLD Prison Boundaries open dataset.
Capacity
880
Current population
1,104
Occupancy
125%
Year opened
2001
Operational
Figures from official sources · verified 2 Jun 2026 · methodology
Operator
Federal Bureau of PrisonsPopulation held
male
Opened
2001
Region
California
Security level
Maximum
Death-row facility
No
No conditions summary available yet.
Visiting days and hours are set by the Warden and vary by housing unit; consult the facility's official visiting regulations for the current schedule. All visitors must be on the inmate's approved visitor list (submitted on BOP form BP-A0629) and present government-issued photo ID. Dress-code and contraband restrictions apply — review the visiting regulations before arriving. Call 209-386-0257 to confirm hours before your visit. Full regulations: https://www.bop.gov/locations/institutions/atw/
Address mail to: [Inmate Name & Register Number], USP Atwater, P.O. BOX 019001, Atwater, CA 95301. No cash, staples, or metal fasteners. Books must be sent directly from a publisher or approved retailer. Photos must not be Polaroid and may not exceed limits set by policy. Money orders payable to the inmate's name and register number; or use Western Union QuickCollect to the BOP Trust Fund. TRULINCS (CorrLinks) provides email where the inmate has subscribed.
Inmate funds via Western Union QuickCollect to the BOP Trust Fund (receiver: inmate name, prisoner ID, BOP Trust Fund). Email service via CorrLinks where the inmate has subscribed.
No major issues documented in our database.
Derived signal — not a judgement. How it's calculated
What the score is responding to:
This facility scores 12. The national average across 7,437 scored United States facilities is 2 — 10 points above national average.
Same country, matched on type + security level where possible.
How many of our profile fields are populated. We surface this so families and researchers know the limits.
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World Prisons. (2026). Usp Atwater. Retrieved July 21, 2026, from https://worldprisons.com/prisons/usp-atwater
"Usp Atwater." World Prisons. Accessed July 21, 2026. https://worldprisons.com/prisons/usp-atwater.
@misc{worldprisons-usp-atwater,
author = {{World Prisons}},
title = {Usp Atwater},
year = {2026},
url = {https://worldprisons.com/prisons/usp-atwater},
urldate = {2026-07-21}
}