Ben Chuanlong Du's Blog

It is never too late to learn.

Data Sources

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Data Platforms

Data for Computer Vison

Data for NLP

Data for Learning to Rank

Financial Data

Curated Datasets @ Observable


Educational Demographic and Geographic Estimates


Book-Crossing Dataset

Data Sources

The US National Center

Education Statistics Data on educational institutions and education demographics from the US and around the world.

The UK Data Centre

The UK’s largest collection of social, economic and population data.


A large number of polls providing data on public opinion of political and sporting issues.

FBI Uniform Crime Reporting

The FBI is responsible for compiling and publishing national crime statistics, with free data available at national, state and county level.

Bureau of Justice

Here you can find data on law enforcement agencies, jails, parole and probation agencies and courts.

Qlick Data Market

Offers a free package with access to datasets covering world population, currencies, development indicators and weather data.

NASA Exoplanet Archive

Public datasets covering planets and stars gathered by NASA’s space exploration missions.

UN Comtrade Database

Statistics compiled and published by the United Nations on international trade. Includes Comtrade Lab which is a showcase of how cutting edge analytics and tools are used to extract value from the data.

Financial Times Market Data

Up to date information on financial markets from around the world, including stock price indexes, commodities and foreign exchange.

Examine and analyze data on internet search activity and trending news stories around the world.


The advantage Twitter has over the others are that most conversations are public. This means that huge amounts of data is available through their API on who is talking about what, where, when and why.

Google Scholar

Entire texts of academic papers, journals, books and legal case law.


As with Twitter, Instagram posts and conversations are public by default. Their APIs allow likes, mentions and business details to be analyzed.


The world’s largest open database of companies.

Glassdoor API

Information about job vacancies, candidates, salaries and employee satisfaction is available through their developer API.

IMDB Datasets

Datasets in a number of formats drawn from the web’s largest resource on movies, television and people working in those industries.


Data Dumps Datasets on books including catalogs from libraries around the world

Labelled Faces in the Wild

13,000 collated and labeled images of human faces, for use in developing applications involving facial recognition.

Microsoft Marco

Microsoft’s open machine learning datasets for training systems in reading comprehension and question answering.

Machine Learning Dataset Repository

Collection of open datasets contributed by data scientists involved in machine learning projects.

eBay Market Data

Insights Data on millions of online sales and auctions from eBay

Natural History Museum Data Portal

Information on nearly 4 million historical specimens in the London museum’s collection, as well as scientific sound recordings of the natural world.

CERN Open Data

More than one petabyte of data from particle physics experiments carried out by CERN.

One Million Audio Cover Images

Dataset hosted at covering music released around the world, for use in image processing research

Complete Public Reddit Comments Corpus

Over one billion public comments posted to Reddit between 2007 and 2015, for training language algorithms

Microsoft Azure Data Markets Free Datasets

Freely available datasets covering everything from agriculture to weather

Irish Electric Vehicle Charge Point Status

Collates data from the body which oversees the network of EV charge points across the Republic of Ireland and Northern Ireland.


Pollution and air quality data from across London