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Global Urban Demographic Dataset (GUDD) Explorer

Explore demographic snapshots, change, and the drivers of population growth—then select any city for detailed charts.

Andrew Zimmer, Nina Brooks, Andrea E. Gaughan & Cascade Tuholske Zimmer · Brooks · Gaughan · Tuholske (2026) · Nature Cities

Paper Briefing GitHub

Nature Cities July 2026 cover: Urban populations in flux

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Color shows migration’s share of positive population growth; point size shows total growth. To match the paper, cities with negative natural change or migration are omitted.

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About this explorer

Research, data & citations

The Global Urban Demographic Dataset provides annual city-level estimates of population size, age–sex structure, natural change, and net migration for more than 10,000 cities worldwide from 2000 to 2020.

Read the open-access paper ↗ Read the free Research Briefing ↗ View the Harvard Dataverse record ↗ View the source code ↗

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Citations

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Paper

Nature Cities article

DOI ↗

Zimmer, A., Brooks, N., Gaughan, A. E., & Tuholske, C. (2026). Global divergence in urban demographic change and migration patterns. Nature Cities, 3, 599–607. https://doi.org/10.1038/s44284-026-00447-7

@article{zimmer2026global,
  author = {Zimmer, Andrew and Brooks, Nina and Gaughan, Andrea E. and Tuholske, Cascade},
  title = {Global divergence in urban demographic change and migration patterns},
  journal = {Nature Cities},
  year = {2026},
  volume = {3},
  pages = {599--607},
  doi = {10.1038/s44284-026-00447-7},
  url = {https://doi.org/10.1038/s44284-026-00447-7}
}

Research Briefing

Plain-language summary

DOI ↗

A clearer picture of who lives in the world’s cities. (2026). Nature Cities, 3, 580–581. https://doi.org/10.1038/s44284-026-00469-1

@article{naturecities2026clearer,
  title = {A clearer picture of who lives in the world’s cities},
  journal = {Nature Cities},
  year = {2026},
  volume = {3},
  pages = {580--581},
  doi = {10.1038/s44284-026-00469-1},
  url = {https://doi.org/10.1038/s44284-026-00469-1}
}

Dataset

GUDD version 1

DOI ↗

Zimmer, A., Brooks, N., Gaughan, A. E., Giezendanner, J., & Tuholske, C. (2026). Global Urban Demographic Dataset (GUDD), version 1 [Data set]. Harvard Dataverse. https://doi.org/10.7910/DVN/GMV8WG

@misc{zimmer2026gudd,
  author = {Zimmer, Andrew and Brooks, Nina and Gaughan, Andrea E. and Giezendanner, Jonathan and Tuholske, Cascade},
  title = {Global Urban Demographic Dataset (GUDD), version 1},
  year = {2026},
  publisher = {Harvard Dataverse},
  version = {1},
  doi = {10.7910/DVN/GMV8WG},
  url = {https://doi.org/10.7910/DVN/GMV8WG},
  note = {Data set}
}

Code

Explorer and analysis

GitHub ↗

Zimmer, A., Brooks, N., Gaughan, A. E., Giezendanner, J., & Tuholske, C. (2026). Global divergence in urban demographic change and migration patterns (Version 1.0.0) [Computer software]. GitHub. https://github.com/zimmermaps/urban_demography

@misc{zimmer2026urbanDemography,
  author = {Zimmer, Andrew and Brooks, Nina and Gaughan, Andrea E. and Giezendanner, Jonathan and Tuholske, Cascade},
  title = {Global divergence in urban demographic change and migration patterns},
  year = {2026},
  version = {1.0.0},
  howpublished = {GitHub},
  url = {https://github.com/zimmermaps/urban_demography},
  note = {Computer software}
}

Published data

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