There will be a quota of 70 athletes (40 men and 30 women). Each NOC is allowed to enter a maximum of 3 men and 3 women. The hosts Mexico is guaranteed 6 spots, either through qualifying or through a guaranteed host nation place. An athlete does not qualify through this system, rather he/she qualifies a spot for their nation, an athlete may not qualify more than 1 quota spot. [1]
| NOC | Men | Women | Total |
|---|---|---|---|
 Argentina | 3 | 2 | 5 |
 Barbados | 1 | 1 | |
 Bermuda | 1 | 1 | 2 |
 Bolivia | 1 | 1 | |
 Brazil | 3 | 3 | 6 |
 Canada | 2 | 1 | 3 |
 Chile | 3 | 3 | 6 |
 Colombia | 2 | 2 | 4 |
 Costa Rica | 2 | 1 | 3 |
 Cuba | 2 | 1 | 3 |
 Ecuador | 2 | 2 | 4 |
 El Salvador | 1 | 1 | |
 Guatemala | 2 | 1 | 3 |
 Mexico | 3 | 3 | 6 |
 Nicaragua | 1 | 1 | |
 Panama | 1 | 1 | |
 Paraguay | 1 | 1 | |
 Puerto Rico | 1 | 2 | 3 |
 United States | 3 | 3 | 6 |
 Uruguay | 1 | 1 | 2 |
 Venezuela | 3 | 1 | 4 |
 Virgin Islands | 1 | 1 | |
| Total athletes | 39 | 28 | 65 |
| Total NOCs | 21 | 13 | 22 |
The following is a list of qualified athletes: [2]
| Event | Location | Vacancies | Qualified |
|---|---|---|---|
| 2010 Central American and Caribbean Games [1] |  Mayagüez | 2 | Mexico Mexico |
| 2010 South American Games [1] |  Medellín | 1 | Brazil Colombia |
| 2011 South American Triathlon Championship [3] |  Salinas | 1 | Brazil |
| 2011 Central American and Caribbean Triathlon Championship [1] | Guatape | 1 | Colombia |
| ITU Ranking list on June 30, 2011 Positions 1-55. [1] | 6 | United States United States Costa Rica Brazil United States Canada | |
| ITU Ranking completed by PATCO ranking | 4 | Argentina Canada Chile Mexico | |
| PATCO Ranking list on June 30, 2011 Positions 1-125 [1] | 15 | Colombia Barbados Argentina Cuba Argentina Guatemala Chile Puerto Rico Canada Guatemala Chile Costa Rica Venezuela Panama Costa Rica Venezuela Cuba | |
| Host Nation spots 1 | 3 | Venezuela El Salvador Uruguay | |
| Invitational [1] | 6 | Bermuda Virgin Islands Bolivia Ecuador Ecuador Nicaragua | |
| TOTAL | 39 |
^1 Mexico qualified athletes through other routes, so its automatic spots have been given to other countries.
^2 Countries that are marked with a strike have withdrawn and there quota spot put in the wildcard pool.
The following is a list of qualified athletes: [4]
| Event | Location | Vacancies | Qualified |
|---|---|---|---|
| 2010 Central American and Caribbean Games [1] | Mayagüez | 2 | Mexico Bermuda |
| 2010 South American Games [1] | Medellín | 1 | Chile Colombia |
| 2011 South American Triathlon Championship [5] | Salinas | 1 | Brazil |
| 2011 Central American and Caribbean Triathlon Championship [1] | Guatape | 1 | Cuba |
| ITU Ranking list on June 30, 2011 Positions 1-55. [1] | 4 | Canada United States United States United States Canada Canada | |
| ITU Ranking completed by PATCO ranking | 1 | Argentina | |
| PATCO Ranking list on June 30, 2011 Positions 1-125 [1] | 10 | Chile Colombia Brazil Ecuador Mexico Brazil Colombia Costa Rica Puerto Rico Mexico | |
| Host Nation spots 1 | 3 | Puerto Rico Ecuador Chile | |
| Invitational [1] | 5 | Argentina Venezuela Guatemala Paraguay Uruguay | |
| TOTAL | 28 |
^1 Mexico qualified athletes through other routes, so its automatic spots have been given to other countries.
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