| Sport | Rugby union |
|---|---|
| First season | 1951 |
| Organising body | Sudamérica Rugby |
| No. of teams | 13 |
| Most recent champion(s) |  Argentina (2020) |
| Most titles | Argentina (36 titles) |
| Related competitions | Americas Championship |
| Tournament format | Round robin |
The South American Rugby Championship refers to the continental rugby union championships for South America, organized by Sudamérica Rugby.[1][2] The current name of the championships is South American Six Nations, implemented in 2018. Throughout history, South American Championships have also existed for lower divisions of the rugby union championships, as well as youth and women tournaments, and editions for rugby sevens.