Johnson County topographic maps

Average elevation: 238 m

Average elevation: 234 m

North Liberty is located on the Iowan erosion surface. Drivers on I-380 experience an abrupt transition from the muted topography of the Iowan surface to the rolling hills of the Southern Iowa drift plain, four miles south of North Liberty.

Average elevation: 235 m

Average elevation: 227 m

Average elevation: 196 m

Average elevation: 228 m

The elevation at the Iowa City Municipal Airport is 668 ft (204 m) above sea level.

Average elevation: 216 m

Average elevation: 224 m