Pedro de Gamboa (died 1550) was a Spanish soldier who fought for Henry VIII of England in France and Scotland.
Eustace Chapuys describes him as a Maestre de Campo, a Colonel, and places him at the battle of Ancrum.
Gamboa and 70 of his men joined an attack on Dalkeith Castle on 3 June 1548 in attempt to capture George Douglas of Pittendreich.
[4] In July 1548 Gamboa's mounted arquebusiers, commanded by another Spanish captain, Pedro de Negro, rode through French lines to relieve the siege of Haddington, as an English soldier Thomas Holcroft noted.
The chronicle relates that Spanish and English cavalrymen rode into Haddington carrying bags of gunpowder.