The question that is often asked in the SNA academic community is where a researcher can get ready datasets. As a prepared answer to such questions here is a short list of repositories of datasets for social network analysis.
- Stanford Large Network Dataset Collection (https://snap.stanford.edu/data/)
Perhaps one of the most famous SNA repositories. Includes huge datasets of Wikipedia, Twitter and Facebook data. - KONECT (http://konect.uni-koblenz.de/)
Koblenz Network Collection contains 281 large network datasets of different types from various spheres. Good collection of authorship, coauthorship and citation networks. - Corporate Elites (http://www.eelkeheemskerk.nl/networks/)
Dutch financial social networks from as early as 1902. 12 datasets downloadable in cvs and xls. - UCINET datasets (https://sites.google.com/site/ucinetsoftware/datasets)
Some datasets in UCINET format. - http://www-personal.umich.edu/~mejn/netdata/
Datasets from different fields, including literature. Some older ones.
There are also smaller lists maintained by individuals: 1, 2. You should probably check them as well. As well as Indiana University list and Pajek databases.
If you have suggestions of what should be added to the list, please comment.