10. Colorado
Horse Population: 255,503
Horses per square mile: 2.5
Number of People/Horses: 18.0
At the 10th place of our today’s list, we have Colorado. A state filled with beautiful vistas and breathtaking scenery. But, everything looks even better when you add a horse to the frame. It is a great state to live in, if you like horses and mountains and perhaps skiiing, or weed or both.