Find Data for Analysis

Public Data

• Open Data Portals from Around the World -- Includes US Federal, NYC, Chicago, DC, Seattle
• Awesome Public Datasets - large but categorized list by topic and data type
• Data Is Plural - Weekly feed (with archive) of interesting datasets

Collections by Statistical Method

• UCI Machine Learning Repository - table that can be filtered by data characteristics or topic
• DASL: Dataset and Story Library - filter by number of cases and keyword. In tab-delimited format.

Classic Practice Data 

• CORGIS: The Collection of Really Great, Interesting, Situated Dataset - Provides data in csv or json
• RDatasets - repository for datasets distributed with R and various R packages

Suggested Data Science Projects

• 24 Ultimate Data Science Projects To Boost Your Knowledge and Skills (AnalyticsVidhya)
• 18 places to find data sets for data science projects (DataQuest)
• The 50 Best Free Datasets for Machine Learning (Lionbridge)

Crowdsourced Data Collections

• Kaggle Datasets - (registration required) user-contributed open data with preview or Competition Data
• Data World  - (registration required) tagged and searchable user-contributed data with previews
• Registry of Open Data on AWS - Many large datasets on a variety of topics.

Interesting General Data

• MIT EdX Participants - deidentified records of individuals use of course materials 
• Bike Share Data Systems - links to multiple data portals to get trip information
• National Electronic Injury Surveillance System (NEISS) - huge database of product injuries
• MovieLens - Movie ratings in datasets of varying size, good for merging
• Stanford Open Policing Project - data by state about police stops, including driver race and outcome
• Yelp Open Dataset - reviews, business attributes, and picture datasets. Get ideas from their challenges.
• Google Trends - see and compare what people are searching for over time (More Info)
• See also the guide page on  Twitter and other Social Media
• See also the tab Browse Data for Projects

Data for Specific Activities

• Stanford Large Network Dataset Collection - for Social Networks, collaboration, road, and many others
• Sample Social Network Datasets - good for teaching and formatted for Gephi and similar tools 
• Index of Complex Networks - real-world data sets from across all domains of science, filterable by properties and topic.
• Personality Testing Data - real data for many scales, good for factor analysis
• Centre for Multilevel Modelling Datasets - a small collection of multi-level datasets in MLwinN and fixed format. 
• Image Sets by Computational Vision at Caltech - including bird, faces, toys, cars, buildings, and many more
• Generalized Linear Models Datasets - small, teaching datasets by link function
• Panel Study of Income Dynamics - panel/longitudinal data on employment, income, wealth, expenditures, health, marriage, childbearing, child development, philanthropy, education, and numerous other topics.
• See the Text Mining InfoGuide
• See the Geospatial Data InfoGuide​

Data Generators

• Generate Data.com - 30+ data types for each variable, uniquely including latitude/longitude and credit card data
• Spawner - Windows software with similar capabilities, uniquely including more control over text, date/time, and network info; also with SQL export
• Dataset Generator for Learning Introductory Statistics - for particular tests and p-values

Teaching with Data

• Teaching & Learning with ICPSR - Over 50 guides, organized by topic and analysis type
• Portal Project Teaching Database - A small collection of real-world data in ecology that has been simplified
• Census at School - Data from school children across the US on a variety of characteristics
• Teaching datasets & Ideas for teaching (UK Data Service)  - 4 projects, with guides, SPSS syntax, and data
• Journal of Statistics Education Data Archive - Data from years of articles
• ​Biostatistics Datasets from NHLBI (must be requested)

Data for Replication

• ASA Data Expo - Get datasets and see what others did with it
• R Users: Analyze Survey Data for Free - to get and replicate numbers from dozens of government studies
• Replicate in Economics - Lists of papers indicating methods and availability of data and code
• Pew Research Center - Publications using each dataset are listed with the data
• Data and Story Library - Data for specific statistical analyses
• Time-Sharing Experiments for the Social Sciences Past Projects
• ICPSR's Bibliography of Data-related Literature - Index of articles that have used ICPSR data
  • Search the library's holdings to obtain the full-text article
  • See also Studies with Replication Materials
• Repositories of Class Projects: Harvard GOV2001, Cambridge Replication Workshop