Idaho real estate glossary
Current Growth Trends in the Treasure Valley
The Treasure Valley is experiencing sustained, rapid population growth, with the Boise Metropolitan Statistical Area (encompassing Ada, Canyon, Boise, Gem, and Owyhee counties) surpassing 876,000 residents as of 2026. While large urban centers remain the primary drivers of total numeric growth, smaller suburban cities such as Star and Kuna are experiencing the highest percentage growth rates, reflecting a shift in residential development patterns across the region.
Updated with grounded research as of 2026-07-21.
The short answer
As of July 2026, the Treasure Valley is defined by rapid, sustained growth that has significantly outpaced much of the country. While the total population for Ada and Canyon Counties combined has reached 876,760—an increase of 150,000 residents since the 2020 Census—the geographic distribution of this growth is shifting. Smaller suburban communities like Star and Kuna are currently leading in percentage-based growth (each at 14% annually), as residents increasingly seek new construction and larger lots in areas surrounding the traditional urban core of Boise and Meridian. Meanwhile, cities like Caldwell are contributing heavily to the region's overall numeric population gain.
Key facts
- Ada and Canyon County Combined Population (2026 Estimate)
- 876,760 residents, representing an increase of 150,000 people since the 2020 Census.
- Growth Leaders by Percentage (2026)
- Star and Kuna led the region with 14% annual growth rates, significantly outpacing larger cities like Meridian and Nampa (approx. 3% growth).
- Numeric Growth Leader (2026)
- Caldwell led all Treasure Valley cities in total numeric population gain during the most recent reporting period.
Shift Toward Suburban Expansion
The growth trajectory of the Treasure Valley has evolved beyond the expansion of Boise proper. While Boise, Meridian, and Nampa remain the largest population hubs, the most rapid percentage increases are occurring in satellite communities. This trend is driven by a preference for newer housing developments, more land per property, and a search for value as urban housing markets become more competitive.
- Star has seen a 130%+ increase in population since 2020.
- Kuna has become a top-tier growth engine, attracting thousands of new residents annually.
- Suburban growth is pushing development outward into previously rural stretches of the valley.
Regional Infrastructure and Planning
The Community Planning Association of Southwest Idaho (COMPASS) actively monitors these shifts to guide regional transportation and public service planning. Infrastructure projects, such as upgrades to the I-84 corridor, are increasingly focused on connecting these high-growth suburban hubs to employment centers in Boise and Meridian.
- Growth is evaluated using a combination of building permits, household sizes, and vacancy rates.
- Long-term forecasts (out to 2055) suggest the two-county area could reach 1.3 million residents.
Market Dynamics for Residents
Relocating to or living in the Treasure Valley in 2026 requires understanding the 'mixed-speed' market. While competition remains high in desirable, well-priced, and updated neighborhoods, buyers in secondary cities may find more opportunities for new construction and inventory that sits on the market longer than in the center of Boise.
- Median home prices remain sensitive to national mortgage rate fluctuations.
- Inventory is increasing in some areas, offering a more balanced landscape compared to the rapid appreciation of previous years.
Common questions
Which cities are growing the fastest in the Treasure Valley?
As of the 2026 COMPASS estimates, Star and Kuna are experiencing the highest percentage growth rates at approximately 14% annually.
What is the total population of the Treasure Valley?
As of April 2026, the combined population of Ada, Canyon, Boise, and Elmore Counties is estimated at 915,940, with 876,760 of those residents living in Ada and Canyon Counties.
Related Idaho questions
- What infrastructure projects are planned to support Treasure Valley growth?
- How does the Community Planning Association of Southwest Idaho (COMPASS) forecast future population?
- What is the projected economic impact of the Treasure Valley's population growth?