The Snapping Turtle (Chelydra serpentina), more formally referred to as the Common Snapping Turtle when properly distinguished from its larger cousin the Alligator Snapping Turtle, is a large freshwater turtle of the family Chelydridae, and ranges from southeastern Canada south, west to the Rocky Mountains (and beyond, where introduced), throughout Mexico, and as far south as Ecuador. It is also widely referred to as the Snapper.

Common snappers are noted for their pugnacious dispositions when out of the water, their powerful beak-like jaws and their highly mobile head and neck (hence the specific name "serpentina," meaning "snake-like"). In some areas they are hunted heavily for their meat, a popular ingredient in turtle soup. Common snappers have lived for up to 39 years in captivity, while the lifespan of wild individuals is estimated to be around 30 years.