Agostino Abbagnale (born 25 August 1966) is an Italian rower and triple Olympic gold medalist. He is the younger brother of multiple Olympic medalists Carmine Abbagnale and Giuseppe Abbagnale.

Abbagnale was born in the hamlet of Messigno, Pompei, into the rowing dynasty headed by his elder brothers Giuseppe and Carmine. He began training on the Sarno river under their uncle-coach Giuseppe La Mura and by 19 had stroked the Italian eight to silver at the 1985 World Rowing Championships in Hazewinkel.

Selected for the men's quadruple sculls at the 1988 Summer Olympics in Seoul, Abbagnale joined Gianluca Farina, Piero Poli and Davide Tizzano to win Italy's first Olympic sculling title in a time of 5 m 43.40 s, only minutes after his brothers triumphed in the coxed pair.

After the medal ceremony, Abbagnale, who is a poor swimmer, jumped into the rowing lake and landed on one of his partners Davide Tizzano, knocking the gold medal out of his hand. It took scuba divers two days to recover the missing medal.^{[citation needed]}

Weeks later he was diagnosed with deep-vein thrombosis linked to a congenital protein-C deficiency, forcing a five-year hiatus from competition. In 2000 coach-physician Giuseppe La Mura explained that lifetime anticoagulant therapy made banned substances "a lethal combination" for the rower, rebutting doping rumours.

Abbagnale returned to the Olympic stage at the 1996 Summer Olympics in Atlanta, teaming with Davide Tizzano to win the Gold in the double scull (2x).

Switching back to the quad, he claimed consecutive world championships in 1997 (Aiguebelette) and 1998 (Cologne).

At the 2000 Summer Olympics in Sydney he, Rossano Galtarossa, Alessio Sartori and Simone Raineri won in 5 m 45.56 s, the last Italian rowing gold of the 20th century.