Idaho local data guide

Demographic Trends for Boise and Meridian, Idaho (2026)

The Treasure Valley continues to experience significant expansion, though the dynamics of this growth are shifting. While Boise remains the largest city, smaller suburban communities are recording the fastest percentage growth rates. Regional planning data indicates that the combined population of Ada and Canyon counties has grown by 150,000 residents since 2020, driven by a robust labor market and evolving housing demands.

Updated with grounded research as of 2026-09-09.

The short answer

Idaho’s Treasure Valley, anchored by Boise and Meridian, continues to be a focal point for regional growth. While Boise retains its status as the primary population hub, demographic trends show a shift toward suburban expansion, with smaller outlying communities often outpacing the core cities in percentage growth rates. This influx of residents is supported by a strong regional labor market, though it simultaneously places ongoing pressure on housing supply and infrastructure planning.

Key facts

Boise Population (2025 Estimate)
238,429
Meridian Population (2025 Estimate)
142,988
Ada & Canyon County Growth (Since 2020)
150,000 new residents

The Shifting Landscape of Growth

While Boise remains the population center for Idaho, the nature of regional development has evolved. Growth is no longer concentrated solely in the urban core; instead, smaller cities like Star and Kuna are seeing significantly higher percentage growth rates compared to the larger cities of Boise and Meridian. This trend reflects a broader pattern of residential migration toward suburban and exurban areas within the Treasure Valley.

Regional Development Metrics

Regional planning agencies, such as the Community Planning Association of Southwest Idaho (COMPASS), utilize localized data points to track this expansion. By aggregating building permits, household sizes, and annexation data, planners create yearly updates that are critical for housing and infrastructure decisions. This methodology provides a more granular view of growth than decennial census data alone, highlighting how rapid development in the Treasure Valley impacts resource allocation.

Economic and Housing Implications

The Treasure Valley’s population trajectory is closely tied to economic opportunity. With median household incomes in cities like Meridian reaching $100,795 as of 2024, the region remains a draw for professionals and families. However, this demographic pressure necessitates ongoing adjustments to local planning, as the market responds to the need for diverse housing options to accommodate a growing and increasingly affluent workforce.

Common questions

Which Idaho cities are growing the fastest?

While Boise and Meridian have the largest total populations, smaller municipalities such as Star and Kuna are currently experiencing the highest percentage growth rates in the region.

How reliable are current population estimates?

Population estimates for 2025 are derived from U.S. Census Bureau data and regional planning indicators like building permits. While highly useful for planning, these are estimates rather than a full census count and can vary based on the specific methodology used by different organizations.

Related Idaho questions

  • What are the current housing market trends in the Treasure Valley?
  • How is infrastructure development keeping pace with population growth in Ada County?
  • What is the projected population growth for the Boise metropolitan area through 2030?

Sources and verification