More Evidence the Treasure Valley is Devouring the Rest of Idaho Twin Falls is projected to see its population grow by nearly 3,000 people this year. The figure pales in comparison to Meridian. Last year, an estimated 8,500 people moved there. The population of Idaho is booming. The population of the Treasure Valley is like the Big Bang. Many people in rural communities are pleased with the status quo and like wide open spaces. Still, it bodes ill when it comes to political power. We’ve long been looking at the continued urbanization of certain pockets of the state. Rural communities aren’t growing. Owyhee, Camas and Franklin Counties aren’t experiencing the massive interest from newcomers. Many people in rural communities are pleased with the status quo and like wide open spaces. Still, it bodes ill when it comes to political power.