UNC Libraries have collections of datasets available for academic and research use by UNC affiliates. On the catalog Advanced Search screen, scroll down until you see the search bar labeled "Resource Type." Click your cursor into the Resource Type search bar and select "Dataset -- Statistical" to browse or search datasets.
When you need data for a topic, one search strategy is to look for research articles on your topic that use data. You can find out where those articles got their data from, and try out their sources to find similar data.