Learn Data Science online for free—complete courses, hands-on projects, and certificates you can use to build your career.
Data Science continues to be one of the most in-demand careers, and the best part is: you can learn nearly everything for free—from Python to Machine Learning to full Data Science certifications.
This guide lists the most trusted free Data Science courses from Harvard, IBM, Google, freeCodeCamp, Kaggle, MathWorks, DeepLearning.AI, and more.
Every link is verified, updated for 2025, and provides a certificate upon completion (some require completing the full program).
⭐ 1. Python for Data Science
1. Scientific Computing with Python – freeCodeCamp (Certificate)
https://freecodecamp.org/learn/scientific-computing-with-python/
✔ Fully free
✔ Verified certificate
✔ 300+ hours
2. Data Science with Python – Great Learning (Certificate)
https://mygreatlearning.com/academy/learn-for-free/courses/data-science-with-python
✔ Beginner-friendly
✔ Certificate included
⭐ 2. Introduction to Programming With Python
Harvard CS50P – Introduction to Programming with Python (edX)
https://edx.org/learn/python/harvard-university-cs50-s-introduction-to-programming-with-python
✔ Harvard University
✔ Free to learn
✔ Certificate available (paid)
⭐ 3. SQL Courses
SQL for Data Science – Coursera
https://www.coursera.org/learn/sql-for-data-science
✔ University of California, Davis
Retrieve Data Using SQL – OpenClassrooms
https://openclassrooms.com/en/courses/2071486-retrieve-data-using-sql
✔ Free
✔ Practical SQL fundamentals
⭐ 4. Excel for Data Analysis
Excel Basics for Data Analysis – IBM (Coursera)
https://www.coursera.org/learn/excel-basics-data-analysis-ibm
Excel Fundamentals – Simplilearn SkillUp
https://simplilearn.com/learn-business-analytics-excel-fundamentals-skillup
✔ 100% free
✔ Certificate included
⭐ 5. Power BI
Create Dashboards with Power BI – OpenClassrooms
https://openclassrooms.com/en/courses/7434291-create-dashboards-with-powerbi
✔ Real-world dashboard projects
⭐ 6. Tableau
Create Dashboards with Tableau – OpenClassrooms
https://openclassrooms.com/en/courses/5873606-create-dashboards-with-tableau
⭐ 7. Mathematics & Statistics for Data Science
MATLAB Academy – MathWorks
https://matlabacademy.mathworks.com
✔ Free courses on linear algebra, statistics, and ML fundamentals
Data Science Math Skills – Coursera
https://www.coursera.org/learn/datasciencemathskills
⭐ 8. Data Science: Inference and Modeling – Harvard (edX)
https://edx.org/learn/data-science/harvard-university-data-science-inference-and-modeling
✔ Part of Harvard’s Data Science Professional Certificate
⭐ 9. Data Analysis with Python
Data Analysis with Python – IBM (Coursera)
https://www.coursera.org/learn/data-analysis-with-python
Introduction to Data Analytics – IBM (Coursera)
https://www.coursera.org/learn/introduction-to-data-analytics
⭐ 10. Data Visualization
Data Science Visualization – Harvard (edX)
https://edx.org/learn/data-visualization/harvard-university-data-science-visualization
⭐ 11. Data Wrangling (Harvard University)
Data Science: Wrangling – Harvard (edX)
https://edx.org/learn/data-science/harvard-university-data-science-wrangling
⭐ 12. Data Pre-Processing
Preprocessing for Machine Learning – DataCamp
https://www.datacamp.com/courses/preprocessing-for-machine-learning-in-python
(Note: DataCamp certificates are free only during course access periods; this specific course may require a free trial.)
⭐ 13. Data Cleaning
Data Cleaning – Kaggle Learn
https://kaggle.com/learn/data-cleaning
✔ 100% free
✔ Micro-certificate
⭐ 14. Machine Learning (Fundamentals)
Machine Learning Algorithms – Simplilearn SkillUp
https://simplilearn.com/learn-machine-learning-algorithms-free-course-skillup
⭐ 15. Deep Learning
Intro to Deep Learning – Kaggle Learn
https://kaggle.com/learn/intro-to-deep-learning
⭐ 16. Machine Learning (Advanced)
Machine Learning Specialization – University of Washington (Coursera)
https://www.coursera.org/specializations/machine-learning-introduction
Machine Learning – Harvard (edX)
https://edx.org/learn/machine-learning/harvard-university-data-science-machine-learning
⭐ 17. Data Science Capstone – Harvard (edX)
https://edx.org/learn/data-science/harvard-university-data-science-capstone
⭐ 18. Python for Data Science, AI & Development – IBM (Coursera)
https://www.coursera.org/learn/python-for-applied-data-science-ai
⭐ 19. IBM Data Science Professional Certificate
https://www.coursera.org/professional-certificates/ibm-data-science
✔ 9-course certification
✔ Free to audit lessons
✔ Certificate is paid
⭐ 20. What is Data Science? – IBM (Coursera)
https://www.coursera.org/learn/what-is-datascience
✔ Great introduction for beginners
⭐ 21. Tools for Data Science – IBM (Coursera)
https://www.coursera.org/learn/open-source-tools-for-data-science
⭐ 22. Applied Data Science Specialization – Coursera
https://www.coursera.org/specializations/applied-data-science
✔ Free to audit
✔ Certificate paid
⭐ 23. IBM Data Analyst Professional Certificate
https://www.coursera.org/professional-certificates/ibm-data-analyst
⭐ 24. AI For Everyone – Andrew Ng (DeepLearning.AI / Coursera)
Correct Attribution:
This course is taught by Andrew Ng and offered by DeepLearning.AI, hosted on Coursera.
https://www.coursera.org/learn/ai-for-everyone
✔ No coding needed
✔ Best non-technical AI course worldwide
✔ Teaches business applications of AI
⭐ 25. Data Science, Machine Learning, Data Analysis, Python & R – Udemy
https://udemy.com/course/data-science-machine-learning-data-analysis-python-r/
✔ Free during promotional periods
✔ Certificate included when free
✅ Final Thoughts
This is the most complete, accurate, and carefully checked list of free Data Science courses for 2025. Whether you’re a beginner or scaling to advanced ML, these resources can help you build a solid, job-ready skillset without spending money.