Common data sources
All disciplines: Figshare, Dataverse, Zenodo, Data.gov, Data Citation Index (part of Web of Science)
Humanities: UK Data Archive
Sciences: GitHub, Dryad
Social sciences: ICPSR, Roper iPoll, American Fact Finder, Pew Research Center, Statistical Abstracts of the US
Business: BusinessDecision, DemographicsNow, IBISWorld, MarketLine, Mergent Online
Others: Web of Science Data Citation Citation Index, and Deep Blue Data
Find additional data repositories:
Look at the license on the dataset (if there is one) to understand how yu can and cannot use the data. Be sure to follow the terms of the license carefully.
If you are re-using data collected by other researchers, you need to be a courteous consumer of that data.
Creative Commons
Open Data Commons License
When re-using a dataset in a publication or presentation, give the complete citation for the dataset (like you would for a scholarly publication).
At a minimum, the citation should include: