جنوب الولايات المتحدة and وسط غرب الولايات المتحدة states generally tend to have more counties than ولايات الغرب الأمريكية or Northeastern states, as many Northeastern states are not large enough in area to warrant a large number of counties, and many Western states were sparsely populated when counties were created.
Southern and Midwestern states generally tend to have more counties than Western or Northeastern states, as many Northeastern states are not large enough in area to warrant a large number of counties, and many Western states were sparsely populated when counties were created.