Food Sources of Potassium,

https://www.webmd.com/diet/foods-rich-in-potassium

Many of the foods that you already eat contain potassium. The foods listed below are high in potassium. If you need to boost the amount of potassium in your diet, make healthy food choices by picking items below to add to your menu.

Many fresh fruits and vegetables are rich in potassium:

Bananas, oranges, cantaloupe, honeydew, apricots, grapefruit (some dried fruits, such as prunes, raisins, and dates, are also high in potassium)
Cooked spinach
Cooked broccoli
Potatoes
Sweet potatoes
Mushrooms
Peas
Cucumbers
Zucchini
Eggplant
Pumpkins
Leafy greens
Juice from potassium-rich fruit is also a good choice:

Orange juice
Tomato juice
Prune juice
Apricot juice
Grapefruit juice
Continued
Certain dairy products, such as milk and yogurt, are high in potassium (low-fat or fat-free is best).

Some fish contain potassium:

Tuna
Halibut
Cod
Trout
Rockfish
Beans or legumes that are high in potassium include:

Lima beans
Pinto beans
Kidney beans
Soybeans
Lentils
Other foods that are rich in potassium include:

Salt substitutes (read labels to check potassium levels)
Molasses
Nuts
Meat and poultry
Brown and wild rice
Bran cereal
Whole-wheat bread and pasta