- Apr 2 Johann Heinrich Jung, German author (Heinrich Stillings Leben), dies at 76
- Apr 4 André Masséna, Duke of Rivoli, Prince d'Essing and Marshal of France (b. 1758)
- Apr 6 Bonaventura Furlanetto, Italian composer, dies at 78
Charles Messier
Apr 12 Charles Messier, French astronomer (cataloguer of "M objects"), dies at 86
