4. Alabama
Venomous snakes count: 11
Of 42 snake species in Alabama, six are venomous. Eastern diamondback rattlesnake is the largest of them, sometimes reaching up to 8 feet in length. This snake is also put on a list of endangered species in Alabama. Venomous snakes of Alabama are: Carolina pygmy rattlesnake, dusky pygmy rattlesnake, eastern cottonmouth, eastern coral snake, eastern diamondback rattlesnake, Florida cottonmouth, northern copperhead, southern copperhead, timber rattlesnake and western cottonmouth western pygmy rattlesnake.