- Mar 20 Frederick Louis, English prince of Wales and son of George II, dies at 44
- Mar 21 Johann Heinrich Zedler, German publisher (b. 1706)
- Mar 25 Frederick of Hessen Kassel, King of Sweden (1720-51), dies at 74
- Mar 29 Thomas Coram, English sea captain and philanthropist (Founder of the Foundling Hospital), dies at 83