THE ORTLEY LAND BRIEF
Land in the
Big Sioux Basin setting.
Ortley township has 33.6 square miles of land in Roberts County. Its Census reference point is in Big Sioux Basin, within Northern Glaciated Plains.
Flat to gently rolling glacial terrain supports a prairie transition between taller and shorter grasses. Many temporary and seasonal wetlands occupy depressions left in the glacial landscape.
Regional context: Northern Glaciated Plains ↗ · Classification at the Census reference point
Ortley and Roberts County
Ortley is associated with Roberts County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Ortley by land and water
The Census records 0.23 square miles of water within Ortley, or 0.7% of its total area. It is 2.4 percentage points lower than the 3.1% recorded for Roberts County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Ortley township has 15 times the land area of nearby Ortley town (2.24 square miles). These areas describe boundaries, not comparable property prices.

