Giordano di San Stefano Ansalone, OP (1598 – 17 November 1634) was an Italian Dominican missionary in Asia.

Having entered the Dominican Order and completed his studies at Salamanca, he was sent in 1625, together with many others, as a missionary to the Philippine Islands.

Whilst serving as chaplain in a hospital for Chinese and Japanese at Manila he learned their languages.

On 18 November he was executed at Nagasaki, Japan, by being suspended till dead from a plank with his head buried in the ground.

Whilst detained in Mexico, on his way to the Philippine Islands, he wrote in Latin a series of lives of Dominican saints after a similar work by Hernando del Castillo [es].