Ercole Visconti (1646–1712) was a Roman Catholic prelate who served as Titular Archbishop of Tamiathis (1678–1712), Apostolic Nuncio to Germany (1680–1687), and Apostolic Nuncio to Florence (1678–1680).^{[1][2][3][4][5][6]}

Ercole Visconti was born in Milan, Italy in 1646 and ordained a priest in the .^[2] On 18 July 1678, he was appointed during the papacy of Pope Innocent XI as Titular Archbishop of Tamiathis.^[1][2] On 31 July 1678, he was consecrated bishop by Carlo Pio di Savoia, Cardinal-Priest of San Crisogono, and Egidio Colonna, Titular Patriarch of Jerusalem, and Francesco Casati, Titular Archbishop of Trapezus, serving as co-consecrators.^[2] On 15 November 1678, he was appointed during the papacy of Pope Innocent XI as Apostolic Nuncio to Florence; he resigned on 13 October 1680.^[2] On 12 October 1680, he was appointed during the papacy of Pope Innocent XI as Apostolic Nuncio to Germany; he resigned in July 1687.^[2] He remained as Titular Archbishop of Tamiathis until his death in 1712.^[2]

While bishop, he was the principal co-consecrator of:^[2]

• Wilhelm Egon von Fürstenberg, Bishop of Strasbourg (1683);

and the principal co-consecrator of:

• Franciscus Liberati, Titular Archbishop of Ephesus (1688);
• Petrus Draghi Bartoli, Titular Patriarch of Alexandria (1690); and
• Baldassare Cenci (seniore), Titular Archbishop of Larissa in Thessalia (1691).