Cardona, officially the Municipality of Cardona, is a municipality in the province of Rizal, Philippines. According to the 2020 census, it has a …Cardona, officially the Municipality of Cardona, is a municipality in the province of Rizal, Philippines. According to the 2020 census, it has a population of 50,143 people. An oral folklore tells how the name “Cardona” was derived from the Spanish word “caldo” referring to a native rice broth. Supposedly, a stranger walking through the street of the town happened to ask the name of the town from a native, who at that time was enjoying a bowl of hot “caldo”. Thinking that the stranger was inquiring as to what he was eating, the native answered "Sapao! Caldo!"