- Simply Statistics: Written by the Biostatistics professors at Johns Hopkins University who also run Coursera's Data Science Specialization
- yhat's blog: Beginner-friendly content, usually in Python
- No Free Hunch (Kaggle's blog): Mostly interviews with competition winners, or updates on their competitions
- FastML: Various machine learning content, often with code
- Edwin Chen: Infrequently updated, but long and thoughtful pieces
- FiveThirtyEight: Tons of timely data-related content
- Machine Learning Mastery: Frequent posts on machine learning, very accessible
- Data School: Kevin Markham's blog! Beginner-focused, with reference guides and videos
- MLWave: Detailed po