Giulio della Rovere, also known as Giulio Feltrio della Rovere (5 April 1533 – 3 September 1578) was an Italian Cardinal of the Catholic Church and a member of the della Rovere family.

Della Rovere was the second son of Francesco Maria I della Rovere and Eleonora Gonzaga[1] and the younger brother of Guidobaldo II della Rovere, Duke of Urbino.

Della Rovere was elevated to cardinal in 1548 at the age of 13.

Ippolito was made Marchese di San Lorenzo.

While bishop, he was the principal consecrator of Giovanni Oliva, Archbishop of Chieti (1568); and Alessandro Mazza, Bishop of Fossombrone (1569).