Boundary County is located in Idaho. About 12,056 people live here (as of 2020). Between 2010 and 2020, the population grew from 10,972 to 12,056. The area covers about 3,311.0 square kilometers. The region is divided into 2 Municipalities. The region was founded in 1915. The dialing code is 208. The name originates from Canada–United States border (international border between Canada and the United States) The license plate code is 9B. Boundary County is county in Idaho, United States. More information at
www.boundarycountyid.org.