| Gaetano Casati | |
| Birth Date: | 4 September 1838 |
| Birth Place: | Lesmo, Austrian Empire |
| Nationality: | Italian |
Gaetano Casati (4 September 1838 – 7 March 1902) was an Italian explorer of Africa, born in Lesmo, at that time in the Austrian Empire.
After studying at the Academy in Pavia he entered the Italian army in 1859 and served there until 1879. On December 24, 1879, he sailed for Africa under commission of the Società d'Esplorazione Commerciale d'Africa. He followed the course of the Welle river and explored the basin of the Bahr-el-Ghazal. In 1882 he was held prisoner for some time by native chiefs of Uganda. In 1883 he joined Emin Pasha and was shut in with him by the Mahdi insurrection. Subsequently, he lived in the Kingdom of Kabba Rega, was condemned to death by the monarch, but escaped to Lake Albert, where Emin Pasha rescued him in 1888. In December 1889, Casati reached the coast with Emin Pasha and Stanley.
Besides reports about his travels, he published Dieci anni in Equatoria in two volumes in 1891. (transl.: "Ten Years in Equatoria", 1891), especially valuable for its account of the Niam-Niam, whom he visited in 1883.