The US Census released the 2010 population numbers for each state and for Idaho it’s 1,567,582. Population grew 21 percent since 2000. Nothing was provided except the statewide count, but from this information an early estimate of the changes in county population can be estimated. The basic approach is to assume:
- 2009 county population estimates are accurate, and
- growth rates from 2009 to 2010 were equal across the state.
Here is a table arranged by percentage change and it provides a pretty good idea for which counties will likely gain more legislative district representation and which ones may lose representation.