When it comes to fast food, some restaurants might claim to be the "king" and another boasts that they have served "billions and billions." Yet in Mercer and Bucks county one chain reigns supreme: Chick-fil-A.

According to Business Insider, they gathered the information from Foursquare to determine the most popular fast-food chain in every state. The formula they used was based on the "most visits on average per location in every state based on the total number of visits to each chain divided by the number of locations in that state." You can check out the map they created below, and you'll notice that Chick-fil-A almost covers the map.

Credit: Business Insider/ Skye Gould

I have to agree that Chick-fil-A's popularity is consistent from New Jersey to Pennsylvania. I remember when I went to the one in Langhorne, PA and it was packed inside. I actually had to wait a bit to find an open table around lunch time on a Saturday. That has never happened to me at a fast food restaurant before. There was also a long line drive-through too. Even the Chick-fil-A close to my house in Hamilton, NJ is very busy. Over the summer, it got so busy that I noticed that they had two long drive-through lanes filled with cars and they had employees taking orders outside with tablets.

Something that did surprise me with the fast food popularity map was the fact that In-N-Out Burger did not take the title for California. When I think 'west coast fast food' I think of In-N-Out. The reason I say this is because during a family vacation to California years ago I made my family go to one like it was a tourist attraction. I also am a huge fan of Katy Perry and since she's a "California gurl" who has talked about her love In-N-Out Burger multiple times I needed to try it.

If you'd like to read more on this and see each state's most popular fast food chain go here