The only poisonous snake we have (maybe) around here is the the Massasauga Rattler. They're pretty small and shy, basically making it something to brag about if you see one.
There are people who claim we have copperheads and cottonmouths, but there are no documented and verified records of either. Our biggest snake is the Black Rat snake, which can reach 6 feet long. Everything else is non-poisonous. Orneriest ones are the water snakes, which never seem to settle down in captivity. The Black snakes are very handy to have around, doing a good job on rats in the barn and such. Most common is the Garter snake, although you do see the occasional hog-nose and milk snake.
I kind of like the things, probably because none of ours are going to make someone dead.
We also have no lizards of any kind, but we do get some big snapping turtles -- pushing 30 lb sometimes.
Northern Ohio winters just are not friendly to reptiles. They don't do well when it hits 20 or 25 below zero on the thermometer.