| Continent: | South America |
| Year: | 1966 |
| Host: | Argentina |
| Dates: | December 2–12 |
| Teams: | 8 |
| Venues: | 1 |
| Cities: | 1 |
| Champions: | Argentina |
| Title Number: | 6 |
| Prevseason: | 1963 |
| Nextseason: | 1968 |
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.
The final standings were determined by a round robin, where the 8 teams played against each other once.
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