Welcome to the nutritional potassium content in 6 different types of butternut squash, ranging from 352 mg to 133 mg per 100g. The basic type of butternut squash is Squash, winter, butternut, raw, where the amount of potassium in 100g is 352 mg. This is 7% of the potassium RDA, from 100g of Squash, winter, butternut, raw. The percentage of the recommended daily allowance (RDA) for potassium is based on a 4700 mg RDA level for a mature adult.