Attica, a maximum-security prison is located in Wyoming County, New York.
Source for all 3 sets of column graphs: U.S. Census Bureau QuickFacts
The Scourge of Racial Bias in New York State's Prison. (The New York Times, 12/3/2016)
Most forbidding are the maximum-security penitentiaries — Attica, Clinton, Great Meadow — in rural areas where the population is almost entirely white and nearly every officer is too. The guards who work these cellblocks rarely get to know a black person who is not behind bars.Clinton County, New York