Where can I find good datasets for data mining?

See also KDnuggets datasets page at www.kdnuggets.com/datasets

and this discussion Free Public Datasets

Many conversations happen on Google group get.theinfo groups.google.com/group/get-theinfo

and www.reddit.com/r/datasets/ - subreddit devoted to datasets

Quora answer www.quora.com/Where-can-I-get-large-datasets-open-to-the-public?q=dataset

OpenData opendata.socrata.com/ has over 100K public datasets

A discussion from Hacker News (news.ycombinator.com/item?id=2165497) has many pointers to good datasets, including

• theinfo.org/
• infochimps.org/datasets (some free, some paid)
• ckan.org [Comprehensive Knowledge Archive Network]
• www.datawrangling.com/some-datasets-available-on-the-web.html
• del.icio.us/pskomoroch/dataset
• news.ycombinator.com/item?id=1242029
• www.reddit.com/r/opendata
• www.trustlet.org/wiki/Repositories_of_datasets
• www.quantlet.org/mdbase/
• datamob.org/
• freebase.com/
• www.archive-it.org/public/all_collections