Diego Prince of Asturias
- Category : Notable-Famous-Royal-family
- Type : GE
- Profile : 3/5 - Martyr / Heretic
- Definition : Split - Large
- Incarnation Cross : RAX Laws 2
Spanish prince, the fourth son of Felipe II of Spain, and also his third son by his fourth wife Anna of Austria. He died from smallpox on 21 November 1582, aged 7, in Madrid.