Apples DO contain potassium.
Though apples do contain potassium, they are not at the top of the potassium rich food chain. One small apple contains 159 milligrams of potassium, which is a good start to adding to the recommended daily dose of potassium of 1600-2000 milligrams.
If you are looking for a power packed potassium diet add acorn squash, which according the Mayo Clinic tops the list at a whopping 896 milligrams of potassium. Additional healthful choices include lentils, green leafy vegetables such as spinach, citrus fruits, melons, raisons, and yogurt.