| Koursaroi | |
| Native Name: | Κουρσάροι |
| Native Name Lang: | el |
| Coordinates: | 35.4817°N 23.5644°W |
| Map: | Greece |
| Archipelago: | Cretan Islands |
| Country: | Greece |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Crete |
| Country Admin Divisions Title 1: | Regional unit |
| Country Admin Divisions 1: | Chania |
| Country Admin Divisions Title 2: | Municipality |
| Population: | 0 |
| Population As Of: | 2001 |
Koursaroi (Greek, Modern (1453-);: Κουρσάροι, "privateers or privateering vessels"), also known as Nisaki (Greek, Modern (1453-);: Νησάκι, "small island"), is an islet close to the western coast of Crete, and north-east of the islet of Praso, in the Aegean Sea. Administratively, it is located within the municipality of Kissamos, in Chania regional unit.