Johnson County Spans Three Distinct Natural Regions

The county covers about 740 square miles. The western part sits in the Grand Prairie — relatively open, rolling terrain. The center is Eastern Cross Timbers, with oak and cedar woodlands on sandier soils. The eastern edge is Blackland Prairie, known for rich dark clay soil good for farming.

This variety in landscape means wildlife habitat and land use differ a lot across the county. Cross Timbers land tends to have more deer and turkey. Blackland Prairie has historically been farmed for cotton and grain. Elevation ranges from about 600 to 1,000 feet. The Brazos River forms the southwestern county border; the Nolan River runs north-south through the county.