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In collaboration with Ada County, Idaho Policy Institute used an objective, statistical approach to determine a set of peer counties for use across County offices and departments. This analysis uses a set of population and demographic variables to identify a group of counties that closely match Ada County’s profile. This peer selection process will help County offices and departments standardize their research about peers and apply lessons learned from these counties into policy and operational decisions throughout County government.

Primary Peer Counties:

  1. Spokane County, WA
  2. Greenville County, SC
  3. Washoe County, NV
  4. Clark County, WA
  5. Seminole County, FL
  6. Knox County, TN
  7. Polk County, IA

Secondary Peer Counties:

  1. Pinal County, AZ
  2. Adams County, CO
  3. Stanislaus County, CA


This report was prepared by Idaho Policy Institute at Boise State University and commissioned by Ada County.