 It was named for Henry H. Bingham, a congressman from Pennsylvania and friend of William Bunn, Idaho's Territorial Governor.The county was formed from Oneida County and was later partitioned itself to form Bannock (1893), Fremont (1893), Bonneville (1911), Power (1913), and Butte (1917) counties.According to the US Census Bureau, the county has a total area of , of which is land and (1.2%) is water.