Ada County, ID
518,907 residents · 1,052 sq mi · 493.3/sq mi · 6% rural
About Ada County
Ada County is located in the southwestern part of Idaho, United States. As of the 2020 census, the county had a population of 494,967, which by 2024 was estimated to have risen to 535,799. Ada County is by far the state's most populous county; it is home to 26.8% of the state's population. The county seat and largest city is Boise, which is also the state capital. Ada County is included in the Boise metropolitan area. The Ada County Highway District has jurisdiction over all the local county and city streets, except for private roads and state roads. In the interior Pacific Northwest east of the Cascade Range, Ada County ranks second in population, behind Spokane County, Washington.
Prepper Assessment
Living in this area offers a semi-arid climate with an annual mean temperature of 52.0°F and 12.0 inches of rain per year. The growing season falls within USDA zone 8a, allowing for a variety of crops, although water availability may be a concern due to the aridity index of 0.51. The terrain is primarily urban, with a population density of 493.3 people per square mile, which may limit the remote, self-sufficient lifestyle some homesteaders seek.
This area faces several notable natural hazards, including a high risk for winter weather (FEMA rank 99) and wildfires (FEMA rank 98). Additionally, heat waves (FEMA rank 93) and strong winds (FEMA rank 92) are common concerns. The cost of living is relatively high, with a median home price of $423,500 and a median household income of $83,881, which could strain budgets for those seeking to establish a homestead.
This county may suit individuals or families looking for urban amenities while still engaging in some level of self-sufficiency. Those who thrive here will likely appreciate the access to resources and broadband connectivity (82% subscription rate). However, the high cost of living and the risk of various natural hazards may deter those seeking a more isolated and risk-averse homesteading experience.