The 3rd FINA World Junior Swimming Championships, were held on August 16–21, 2011, in Lima, Peru.
Medal table
| Rank | Nation | Gold | Silver | Bronze | Total |
|---|---|---|---|---|---|
| 1 | 
United States (USA) | 11 | 8 | 3 | 22 |
| 2 | 
Japan (JPN) | 7 | 9 | 3 | 19 |
| 3 | 
Canada (CAN) | 4 | 5 | 5 | 14 |
| 4 | 
Australia (AUS) | 4 | 1 | 3 | 8 |
| 5 | 
Ukraine (UKR) | 4 | 1 | 2 | 7 |
| 6 | 
Italy (ITA) | 2 | 6 | 5 | 13 |
| 7 | 
Great Britain (GBR) | 2 | 2 | 3 | 7 |
| 8 | 
Spain (ESP) | 2 | 1 | 3 | 6 |
| 9 | 
Greece (GRE) | 1 | 2 | 2 | 5 |
| 10 | 
Germany (GER) | 1 | 0 | 1 | 2 |
| 11 | 
Egypt (EGY) | 1 | 0 | 0 | 1 |
Slovenia (SLO) | 1 | 0 | 0 | 1 | |
| 13 | 
China (CHN) | 0 | 3 | 1 | 4 |
| 14 | 
Poland (POL) | 0 | 2 | 1 | 3 |
| 15 | 
Russia (RUS) | 0 | 1 | 4 | 5 |
| 16 | 
Croatia (CRO) | 0 | 1 | 0 | 1 |
| 17 | 
Brazil (BRA) | 0 | 0 | 1 | 1 |
France (FRA) | 0 | 0 | 1 | 1 | |
South Africa (RSA) | 0 | 0 | 1 | 1 | |
| Totals (19 entries) | 40 | 42 | 39 | 121 | |