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Which counties in Arizona are losing population?

3 of the 15 counties in Arizona had fewer residents in 2025 than in 2020. Greenlee County lost the largest share, down 2.3% (−219 people). Apache County lost the most residents (−1,468).

Of the 3 counties that lost residents between 2020 and 2025, the largest factor was natural change (more deaths than births) in 1 and net domestic migration (more residents moving to other U.S. counties than arriving) in 2 (Census Bureau components of population change).

Data as of 2025 · updated

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All 3 Arizona counties that lost residents

Counties losing population in Arizona
RankCountyChange 2020–25Residents lost 2020–25Residents 2025Largest factor 2020–25
1Greenlee County−2.3%−2199,312Domestic migration (−469)
2Apache County−2.2%−1,46864,445Natural change (−1,299)
3Coconino County−0.6%−814144,368Domestic migration (−3,436)

How this is ranked

Counties whose Census Bureau resident population estimate for July 1, 2025 is lower than for July 1, 2020, steepest percentage decline first. The largest factor is the most negative of natural change (births minus deaths), net domestic migration and net international migration over the same years (Census Bureau components of population change). Counties with fewer than 1,000 residents, or without a figure for the same period as the others, are left out, as on every ranking.

Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025). Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how ranks and figures are built. More on every layer: data sources and licences.

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Questions

Which county in Arizona is losing population fastest?

Greenlee County: down 2.3% between 2020 and 2025, to 9,312 residents (−219 people; Census Bureau population estimates). Next: Apache County (−2.2%) and Coconino County (−0.6%).

How many counties in Arizona are losing population?

3 of the 15 counties in Arizona had fewer residents in 2025 than in 2020; the other 12 grew or held steady.

Why are counties in Arizona losing population?

Of the 3 counties that lost residents between 2020 and 2025, the largest factor was natural change (more deaths than births) in 1 and net domestic migration (more residents moving to other U.S. counties than arriving) in 2 (Census Bureau components of population change).

More county rankings for Arizona

Counties losing population in other states

Across the U.S.