Going grocery shopping for the exact same groceries in one state might cost more than going grocery shopping for the exact same groceries in another state. Take milk, for example. While a gallon of milk in one state might cost less than $2, in another state, it might cost almost double.

Ballotpedia decided to look at exactly how much more milk costs in some states than others. In order do do this, they decided to look at the price of one particular type of milk at one particular type of store in one particular type of city in each state. The milk they looked at was Great Value 2% Reduced Fat Milk which is sold at Walmart. They looked at how much Walmart charged for this particular milk at their stores in the capital city of each state, with one exception. Since there isn’t a Walmart store in Juneau, Alaska, they substituted Anchorage instead.

While you may not buy this particular type of milk, it is interesting to see the pricing trends. For example, in Hawaii, residents pay $4.69 for a gallon of milk, but in Illinois, residents only pay $0.93. That’s for the exact same product at the exact same store. Take a minute to wrap your mind around that. If you don’t live in Illinois, your jaw might have dropped at how little milk costs in that state.

Zippia.com took the data from Ballotpedia and arranged it in an easy to understand map. Look at the map below to see how your state stacked up.

You might be looking at the map thinking, “I pay more than that for a gallon of milk.” Or, perhaps you pay less. It’s important to remember that this data is for a specific type of milk sold at Walmart stores. Milk might cost more at your favorite grocery store than it does at Walmart. If you live in the country, it might cost less than it would in a big city. There are a lot of variables. In general, it’s probably safe to say that states on this map that pay less for one type of milk probably pay less for many other types of milk as well, and states on this map that pay more for one type of milk probably pay more many other types of milk as well.

How much do you usually pay for milk? Do you buy Great Value 2% Reduced Fat Milk? Do you usually pay more or less for milk than the amount listed on this chart for your state? Does it surprise you that milk costs so much more in Hawaii than it does in Illinois?