Johnston is a city located in Polk County, in the state of Iowa (IA), United States. Nestled in the West North Central division of the Midwest region, it covers an area of 14.3 square miles (37.0 km²) and sits at an elevation of 830 ft. With a population of approximately 8,649 residents, Johnston offers a peaceful, rural atmosphere.
The town's population is composed of about 49.13% males and 50.87% females, and it has a population density of 604.83 people per square mile (233.52/km²). Johnston lies at a latitude of 41.67 and a longitude of -93.71, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (0%), followed by English (13.2%), German (39.1%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 50131.