Phillips County
![](/sites/default/files/styles/wide/public/1024px-Map_of_Colorado_highlighting_Phillips_County.svg__0.png?itok=LWBVBYuU)
Phillips County covers 688 square miles on the Great Plains of northeastern Colorado. It has a population of 4,349, more than half of whom live in the county seat of Holyoke.
Phillips County covers 688 square miles on the Great Plains of northeastern Colorado. It has a population of 4,349, more than half of whom live in the county seat of Holyoke.