Johnson County, IA
156,420 residents · 613 sq mi · 255.2/sq mi · 17% rural
About Johnson County
Johnson County is located in the U.S. state of Iowa. As of the 2020 census, the population was 152,854, and was estimated to be 160,044 in 2025, making it the fourth-most populous county in Iowa. The county seat and the largest city is Iowa City, home of the University of Iowa. Johnson County is included in the Iowa City metropolitan area, which is also included in the Cedar Rapids-Iowa City Corridor Combined Statistical Area.
Prepper Assessment
Living in this area offers a mix of urban and rural experiences, with a population density of 255.2 people per square mile. The climate is characterized by an annual mean temperature of 49.3°F and an average rainfall of 37.4 inches, supporting a growing season suitable for USDA zone 7a. While the terrain is generally flat, which can facilitate agriculture, the humidity and potential for strong winds may pose challenges for certain crops and livestock management.
Risks in this area include several significant natural hazards, with strong winds and tornadoes ranking highest on the FEMA scale at 99 and 98, respectively. The population density may lead to some urban stressors, but the violence percentile is low at 2/100, indicating a relatively safe environment. However, the cost of living is moderate, with a median home price of $277,800, which might be a barrier for some seeking affordable land for homesteading.
This county may be a good fit for those who appreciate a blend of rural and urban settings, particularly individuals who can handle the risks associated with severe weather. It's suitable for homesteaders who can navigate the higher housing costs and are prepared for the challenges posed by extreme weather events. However, those seeking a more remote, low-density lifestyle may find the population pressures and potential hazards to be significant drawbacks.