| 21st South American Basketball Championship | |
|---|---|
| Tournament details | |
| Host country | Argentina |
| Dates | December 2–12 |
| Teams | 8 |
| Venue(s) | 1 (in 1 host city) |
| Final positions | |
| Champions |  Argentina (6th title) |
The South American Basketball Championship 1966 was the 20th edition of this regional tournament. It was held from December 2 to 12 in Mendoza, San Juan, Argentina. Eight teams competed.