Idaho local data guide
Boise, Idaho Population Growth
Boise and the broader Treasure Valley region continue to experience significant population growth. As of 2026, the City of Boise has an estimated population of approximately 256,450, while the metropolitan area—comprising Ada, Canyon, Boise, Gem, and Owyhee counties—has surpassed 876,000 residents.
Updated with grounded research as of 2026-07-21.
The short answer
As of 2026, Boise and the surrounding Treasure Valley continue to experience steady population growth, with the city reaching approximately 256,450 residents and the metropolitan area surpassing 876,000. This expansion is driven by ongoing residential development within Boise and rapid percentage-based growth in nearby suburban communities like Star and Kuna, reflecting a wider regional trend of migration and urbanization.
Key facts
- Boise City 2026 Population Estimate
- 256,450
- Boise Metropolitan Area 2026 Estimate
- Over 876,000
- Boise City 2020 Census Population
- 235,685
City of Boise Growth Trends
The City of Boise remains the most populous municipality in Idaho. Since the 2020 Census, which recorded 235,685 residents, the city has seen steady growth. This increase is managed through city planning initiatives that account for housing inventory and infrastructure capacity.
Regional Expansion in the Treasure Valley
The broader Treasure Valley metropolitan area—encompassing Ada, Canyon, Boise, Gem, and Owyhee counties—has grown to over 876,000 residents as of 2026. While Boise acts as the economic and population center, much of the recent percentage-based growth has shifted toward smaller suburban cities.
- Star and Kuna have experienced significantly higher percentage growth rates compared to the Boise city core over the last five years.
- Regional planning integrates multiple county jurisdictions to address transportation and utility needs.
Data Collection and Methodology
Population figures for the region are primarily tracked by the Community Planning Association of Southwest Idaho (COMPASS). Their estimates are updated annually to provide a clearer picture of growth between decennial Census Bureau counts.
- Estimates are calculated using building permits, average household size data, and federal census information.
- Methodologies differ between local agencies and federal entities, which may lead to slight variations in reported figures.
Common questions
What is the difference between 'Boise City' and 'Boise Metro' population figures?
Boise City refers specifically to the population residing within the incorporated municipal boundaries of Boise. The Boise Metro area, often referred to as the Treasure Valley, includes a broader multi-county region that captures the economic and social integration of surrounding cities.
How often is the population data updated?
While the U.S. Census Bureau conducts a major count every ten years, the Community Planning Association of Southwest Idaho (COMPASS) provides annual population estimates to assist in local planning and resource allocation.
Related Idaho questions
- What are the primary drivers of migration to Boise, Idaho?
- How does the population growth in Meridian and Nampa compare to Boise?
- What impact has recent population growth had on Boise's housing market?
Sources and verification
- Learn More About COMPASS Population Data (compassidaho.org)
- Visit the U.S. Census Bureau QuickFacts for Boise (census.gov)
- Learn more about Boise, Idaho Population Growth from xorealestate.com (xorealestate.com)