Suppo I (or Suppone) (died 5 March 824) was a Frankish nobleman who held lands in the Kingdom of Italy in the early ninth century.
In 817, he was made Count of Brescia, Parma, Piacenza, Modena, and Bergamo.
He was also made a missus dominicus, along with the Brescian bishop Ratald, for Italy.
In 818, he was instrumental in putting down the rebellion of Bernard against Emperor Louis the Pious.
Suppo's death was recorded by Einhard and Spoleto went to Adelard, who died within five months, leaving the duchy to Mauring.