Idaho Population By County in 2010

Based on the US Census Vintage data estimates, in 2010, the population of Idaho was 1,570,819. Among all Idaho counties, Ada[object Promise] had the highest population (393,369), followed by Canyon[object Promise] (189,365), and Kootenai[object Promise] (138,860). Clark[object Promise] was the least populated county (981).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.