Giberto of Rialto (31 May 736-?) was a Cardinal of Rialto, Venice until the ascension of Doge Maurizio of Venice in 764.
He was poor at everything, including and especially at his position of Court Chaplain, that many considered it amazing he lasted in the position at all.
In 770, he was replaced with Cardinal Fosco. He had a lawful heir, Pascal, born in 750, a low-born like Giberto, but of no known familial relation. Both of their fates were lost to history.