The red-eared slider (Trachemys scripta elegans) (Br. Eng Red-eared terrapin) is a semiaquatic turtle belonging to the family Emydidae. It is a subspecies of pond slider.

It is the most popular pet turtle in the United States and also popular in the rest of the world.

Red-eared sliders get their name from the small red dash around their ears. The "slider" part of their name comes from their ability to slide off rocks and logs and into the water quickly.

A 1975 U.S. Food and Drug Administration regulation bans the sale (for general commercial and public use) of turtle eggs and turtles with a carapace length of less than 4 inches (100 mm). This regulation comes under the Public Health Service Act, and is enforced by the FDA in cooperation with state and local health jurisdictions.