Idaho local data guide
Long-Term Regional Population Projections for the Treasure Valley
The Treasure Valley—primarily encompassing Ada and Canyon Counties—is experiencing sustained demographic shifts. Planning agencies, specifically the Community Planning Association of Southwest Idaho (COMPASS), forecast that the region will surpass 1 million residents by 2050, necessitating long-range adjustments to infrastructure and land-use policies.
Updated with grounded research as of 2026-10-13.
The short answer
The Treasure Valley is projected to see continued population growth, with the combined population of Ada and Canyon Counties expected to exceed 1 million residents by 2050. Projections from COMPASS estimate a total regional population of approximately 1,075,000 by that time, representing a 37% increase over 2022 levels. By 2040, the population is anticipated to reach approximately 1,035,022.
Key facts
- 2040 Regional Population Projection
- 1,035,022 (Ada and Canyon Counties)
- 2050 Regional Population Projection
- Approximately 1,075,000 (Ada and Canyon Counties)
- Projected Growth Rate (2022-2050)
- 37% increase for the two-county region
Understanding COMPASS Forecasts
The Community Planning Association of Southwest Idaho (COMPASS) serves as the designated Metropolitan Planning Organization for the region. They develop demographic forecasts specifically to support long-range transportation and infrastructure planning. By analyzing future travel demand and housing needs, COMPASS provides data that helps local governments make informed decisions about zoning, public services, and capital improvements.
Regional Growth Dynamics
While the Treasure Valley is often discussed as a singular unit, growth is not distributed evenly. The regional projections for Ada and Canyon Counties aggregate data from various municipalities, each with its own development trajectory. Urban centers often face different pressures regarding density and vertical growth compared to unincorporated areas or smaller outlying communities.
Planning for the Future
Local planning agencies use these long-term projections to prioritize projects such as road expansions, public transit routes, and utility service capacity. For residents and real estate investors, understanding these numbers is essential for anticipating how infrastructure development—or the potential strain on existing services—might impact property values and quality of life in specific neighborhoods through 2050.
Common questions
How are these population projections determined?
Projections are developed using complex modeling scenarios that account for current population, historical growth trends, migration patterns, and local land-use policies. COMPASS updates these forecasts to reflect real-world development and census data.
Are these projections guaranteed?
No. Demographic projections are estimates, not guarantees. They are subject to change based on economic shifts, regional migration, housing market volatility, and changes in local annexation or zoning laws.
Related Idaho questions
- What is the current population of the Treasure Valley?
- How does COMPASS develop their population forecasts?
- What impact does population growth have on Treasure Valley infrastructure planning?
Sources and verification
- COMPASS Demographic Forecasts and Data (compassidaho.org)
- KTVB Treasure Valley Growth Analysis (ktvb.com)
- Learn more about Long-Term Regional Population Projections for the Treasure Valley from facebook.com (facebook.com)