2025 Compare Cities Overview:
Potomac, MD vs Johnston, IA

Are people in Johnston older or younger than people in Potomac?
- The Median Age in Johnston is 8.9 years younger than in Potomac.

Are housing costs cheaper in Johnston or Potomac?
- Johnston housing costs are 70.9% less expensive than Potomac housing costs.

Which city has a longer commute, Johnston or Potomac?
- The average commute for residents of Johnston is 13.2 minutes shorter than it is for residents of Potomac.

Things to do in Potomac?
Potomac, MD is located just outside D.C., offering residents fun experiences like camping or kayaking at Great Falls Park or visiting Georgetown University's campus right along the Potomac river! A resident can also enjoy Potomac's more modern establishments such as National Harbor Marina & Riverwalk which boasts great views of nearby Alexandria while providing access to popular restaurants like Zola Wine & Kitchen or Mama Lucia pizza joint among other favorites!

Things to do in Johnston?
Johnston is located in Polk County, Iowa, and is part of the Des Moines-West Des Moines metropolitan area. With a population of 20,619, it is the third largest city in Iowa's Polk County. Johnston features many recreational amenities like parks and trails as well as numerous educational facilities such as the Johnston Public Library and Johnston High School.