Facebook Social Connectedness Index
Meta's Social Connectedness Index (SCI): the relative probability that two Facebook users in two places are friends, scaled so that the most connected pair is 1,000,000,000. This package is the release distributed on HDX, at several resolutions: country to country, GADM level 1 and 2 regions, geoBoundaries ADM1 and ADM2, EU NUTS 1 to 3 (2024), US counties and US ZIP code tabulation areas, with region-to-country lookups and the methodology paper. Suitable for research on social ties, migration, trade and economic spillovers between regions.
Cite this dataset at
social-connectedness-index.echo.directory
Analytics
The full graph has 3,204 nodes; this view shows the 1,000-node sample the pipeline drew for display. Node size is centrality, colour is community.
Computed over the full corpus.
Record
- Catalog key
social-connectedness-index- Authors
- Johnston, Drew; Kuchler, Theresa; Kulkarni, Manas; Stroebel, Johannes
- Year
- 2026
- Source paper
- The Social Connectedness Index: A large-scale dataset of social ties across geographic locations
- DOI / arXiv
- 10.1016/j.dib.2026.112905
- License
- Creative Commons Attribution 4.0 International (CC BY 4.0) (CC-BY-4.0)
- Records
- 3,204
- Nodes
- 3,204
- Edges
- 5,134,410
- Nodes are
- county
- Edges are
- social connectedness
- Attributes
- nodes have no attributes; edges have attributes
- Languages
- en
- Collected
- 2025-2026 (2020s)
- Tasks
- From the graph: link prediction, community detection
- Region
- United States · North America (inferred: named in the description)
Provenance
- Originally published at
- https://data.humdata.org/dataset/social-connectedness-index unverified
- Hosted copy
- Mirrored on echo.directory on 2026-10-21, 16.3 GB across 20 files. Checksums in MANIFEST.json.
Citations
The Social Connectedness Index: A large-scale dataset of social ties across geographic locations
Drew Johnston, Theresa Kuchler, Manas Kulkarni, Johannes Stroebel
Journal Article · Data in Brief · 2026
Citation data from Semantic Scholar, retrieved 2026-10-20.
How to cite
BibTeX
@misc{echo2026,
title = {ECHO: Exploratory Compendium of Humanity Online},
author = {Switzer, Braden and Zafarani, Reza},
year = {2026},
url = {https://echo.directory},
note = {Syracuse University}
}
@article{Johnston_2026,
title = {The Social Connectedness Index: A large-scale dataset of social ties across geographic locations},
volume = {67},
issn = {2352-3409},
url = {http://dx.doi.org/10.1016/j.dib.2026.112905},
doi = {10.1016/j.dib.2026.112905},
journal = {Data in Brief},
publisher = {Elsevier BV},
author = {Johnston, Drew and Kuchler, Theresa and Kulkarni, Manas and Stroebel, Johannes},
year = {2026},
month = Aug,
pages = {112905}
} APA
Switzer, B., & Zafarani, R. (2026). ECHO: Exploratory Compendium of Humanity Online [Data repository]. Syracuse University. https://echo.directory
Johnston, D., Kuchler, T., Kulkarni, M., & Stroebel, J. (2026). Facebook Social Connectedness Index [Data set]. https://doi.org/10.1016/j.dib.2026.112905
MLA
Switzer, Braden, and Reza Zafarani. ECHO: Exploratory Compendium of Humanity Online. Syracuse University, 2026, echo.directory.
Johnston, Drew, et al. Facebook Social Connectedness Index. 2026, doi.org/10.1016/j.dib.2026.112905.