The data for Butler County are summarized in this water planning data fact sheet.
Butler County is located in northeast Iowa just northwest of Waterloo.
Farming and wholesale and retail trade are the principal economic sectors, as measured by employee earnings. The county contains gently rolling hills with long slopes, the Cedar and Shell Rock River Valleys, and small drainage streams. The population of 15,731 is distributed in 11 incorporated cities and the surrounding rural areas. State Highway 14 crosses the center of the county from north to south. State Highway 3 crosses the center of the county from east to west.