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Lookup NU author(s): Dr Gainbi ParkORCiD, Professor Rachel Franklin
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© 2026 by American Association of Geographers. In recent decades, the United States has experienced substantial changes in population size, composition, and distribution. As growth has slowed, population loss has taken on increased salience, presenting an emerging social, economic, and political challenge and highlighting a need for measures that capture the reality of disparate local population change trajectories. In this article, we use sequencing and clustering algorithms, paired with contemporary and historical U.S. county-level population data (1950–2020), to show the value of incorporating spatial and temporal context in measures of population change, develop a typology of change trajectories, and evaluate observed pathways of loss and growth. Our analysis identifies eight distinctive pathways of population change, ranging from emerging localized loss to constant growth. Most pathways are associated with particular geographies (e.g., “persistent loss” counties dominate the landscape of the Great Plains region), illustrating the spatial polarization of the U.S. demographic experience. A comparison of population composition and components of change further reveals notable differences in demographic characteristics across different types of loss and growth counties.
Author(s): Park G, Seymour E, Franklin R
Publication type: Article
Publication status: Published
Journal: Annals of the American Association of Geographers
Year: 2026
Pages: Epub ahead of print
Online publication date: 17/08/2026
Acceptance date: 13/05/2026
ISSN (print): 2469-4452
ISSN (electronic): 2469-4460
Publisher: Taylor and Francis Ltd
URL: https://doi.org/10.1080/24694452.2026.2691208
DOI: 10.1080/24694452.2026.2691208
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