Allen County Population Still on the Rise with More than 400,000 Residents: Census Data

Allen County surpasses 400,000 residents in 2025 census estimates

Indiana saw estimated population growth from 2024 to 2025 as the state's population approaches 7 million residents. However, experts warn that current trends may not be sustainable.

Allen County population still on the rise with more than 400,000 residents: census data

As a whole, northeast Indiana saw a 2.9% population increase from 2020 to 2025.

March 26: Allen County’s 2025 population grows 4.4% since 2020, while DeKalb and Steuben see declines

FORT WAYNE — Allen County remains Indiana’s third-largest county by population, according to population estimates released March 26 by the U.S. Census Bureau. As of July 1, 2025, Allen County’s population was calculated to be 402,329, reflecting a 4.4% increase…

Area counties continue population growth; Allen third largest in state, new Census data shows

Allen County's population grew 4.4% between 2020 and 2025, according to estimates the U.S. Census Bureau released Thursday.