The Dissected Till Plains are a land region of the United States, located in southern and western Iowa, northeastern Kansas, the southwestern corner of Minnesota, northern Missouri, eastern Nebraska, and southeastern South Dakota.

The Dissected Till Plains were formed around 400,000 years ago by the Nebraskan glaciation. Glacial scouring left behind the rolling hills and rich, fertile soils found today in the region.

The region is also the western edge of the Corn Belt.

Regions of the United States | Natural history of Iowa | Natural history of Nebraska