What poisonous snakes live in Ohio?

Ohio has only three species of venomous snakes, two of which have rattles at the end of the tail (Eastern Massauga (pictured right) & Timber Rattlesnake). The third species is the Northern copperhead. Although many believe the water moccasin occurs in Ohio, it actually ranges no farther north than the Dismal Swamp in southeastern Virginia in the eastern portion of its range, and extreme southern Indiana and Illinois, in the western part of its range. Water moccasins are not native to Ohio.