Idaho Voting Precincts Boundaries

Each County Clerk in Idaho is responsible for records of current voter precinct boundaries by their County per Idaho State Code 34-301. The County Clerk or their designee is required to provide the Idaho Secretary of State (SOS) with this information no later than January 15th in a general election year. Those submissions, submitted in a variety of formats ranging from pdfs, shapefiles, and REST Services are aggregated into one dataset by the Idaho Secretary of States Office and the Idaho Office of Information Technology Services (ITS). Data is manually inspected for anomalies and inconsistent data (duplicate names, missing and overlapping precincts) and issues are resolved during an interactive collaborative process involving the respective county and the SOS office. Precincts along county boundaries are aligned to the best available county boundary data and topology checks are performed to ensure there are no gaps (except along large water bodies and the state boundary) and overlaps. As precincts are changed, deleted and created, those new precincts are added to the dataset. Using filters (ACTIVE = 'Y') as well date fields describing when a given precinct boundary was active this dataset can be used for both current and historic precincts. Data goes back to the 2026 election year.