| Event: | 49er |
| Competition: | 2011 ISAF Sailing World Championships |
| Venue: | Perth, Western Australia |
| Dates: | 12–18 December |
| Competitors: | 134 |
| Nations: | 29 |
| Qualify: | 2012 Summer Olympics |
| Gold Nation: | AUS |
| Gold: | Nathan Outteridge Iain Jensen |
| Silver Nation: | NZL |
| Silver: | Peter Burling Blair Tuke |
| Bronze Nation: | DEN |
| Bronze: | Emil Toft Nielsen Simon Toft Nielsen |
| Prev: | 2010 |
| Next: | 2012 |
The 49er class at the 2011 ISAF Sailing World Championships was held in Perth, Western Australia between 12 and 18 December 2011.[1]