History of Ada County, Idaho

Ada County was created by the Idaho Territorial Legislature on December 22, 1864, partitioned from Boise County. It is named for Ada Riggs, the first pioneer child born in the area and the daughter of H.C. Riggs, a co-founder of Boise. Canyon County, which originally included Payette County and most of Gem County, was partitioned from western Ada County in 1891.

Contact Information

For questions regarding property valuation, ownership and legal descriptions. Ada County Assessor 190 E Front St. Suite 107 Boise, ID 83702 208-287-7200 Email: assessormail@adaweb.net Website: https://adacounty.id.gov/Assessor For questions regarding property taxes and tax payments. Ada County Treasurer 200 W Front St Boise, ID 83702 208-287-6800 Email: propertytaxquestions@adaweb.net Website: https://adacounty.id.gov/treasurer

History of Ada County, Idaho

Ada County was created by the Idaho Territorial Legislature on December 22, 1864, partitioned from Boise County. It is named for Ada Riggs, the first pioneer child born in the area and the daughter of H.C. Riggs, a co-founder of Boise. Canyon County, which originally included Payette County and most of Gem County, was partitioned from western Ada County in 1891.