El 1° de marzo comenzó el período de clasificación de la natación para los Juegos Olímpicos Río 2016. Un total de 900 nadadores competirán en 32 eventos.
A continuación, se detallan las Marcas A y B para cada una de las pruebas. Además, se detallan todos los torneos que suman puntos para la clasificación olímpica:
| AFRICA | ||||
| Start | End | Event Name | City | Fed. |
| 15-May-15 | 17-May-15 | Mauritius Championships | Beau Bassin | MRI |
| AMERICAS | ||||
| Start | End | Event Name | City | Fed. |
| 1-Apr-15 | 4-Apr-15 | 2015 Canadian Swimming Trials | Toronto | CAN |
| 15-Apr-15 | 18-Apr-15 | Mesa Grand Prix | Mesa | USA |
| 14-May-15 | 17-May-15 | Charlotte Grand Prix | Charlotte | USA |
| 27-May-15 | 31-May-15 | National Age group Championships | Barquisimeto | VEN |
| 28-May-15 | 31-May-15 | Bermuda National Swimming Championships 2015 | Hamilton | BER |
| 28-May-15 | 31-May-15 | ASATT Open Long Course Championships | Port of Spain | TRI |
| 18-Jun-15 | 21-Jun-15 | Santa Clara Grand Prix | Santa Clara | USA |
| 17-Jul-15 | 20-Jul-15 | Campeonato Nacional PreJuegos | Cucuta | COL |
| 29-Jul-15 | 3-Aug-15 | 2015 Canadian Age group Championships | Quebec City | CAN |
| 6-Aug-15 | 9-Aug-15 | 2015 Canadian Swimming Championships | Montreal | CAN |
| 10-Sep-15 | 13-Sep-15 | II National Open September 2015 Championships | Barquisimeto | VEN |
| 10-Dec-15 | 13-Dec-15 | ASATT Invitational Long Course Championships | Port of Spain | TRI |
| 10-Dec-15 | 13-Dec-15 | Campeonato Nacional InterClubes 2015 | Medellin | COL |
| 16-Dec-15 | 19-Dec-15 | Nacional Open 2015 | Santiago | CHI |
| 28-Jan-16 | 31-Jan-16 | Nacional de Verano 2016 | Santiago | CHI |
| ASIA | ||||
| Start | End | Event Name | City | Fed. |
| 17-Mar-15 | 22-Mar-15 | 46th National Age Group Swimming Championships | Singapore | SIN |
| 7-Apr-15 | 12-Apr-15 | 2015 Japan National Swimming Championships | Tokyo | JPN |
| 9-Apr-15 | 16-Apr-15 | National Swimming Championships 2015 | Baoji | CHN |
| 4-Jun-15 | 8-Jun-15 | National Age Group Swimming Championships & International Invitation | Taipei | TPE |
| 6-Jun-15 | 11-Jun-15 | 28th SEA Games | Singapore | SIN |
| 25-Jun-15 | 28-Jun-15 | 11th Singapore National Swimming Championships | Singapore | SIN |
| 25-Aug-15 | 30-Aug-15 | 5th FINA World Junior Swimming Championships 2015 | Singapore | SIN |
| 3-Sep-15 | 7-Sep-15 | 2015 National Presidential Cup Age Group Swimming Championships | Taipei | TPE |
| 6-Sep-15 | 10-Sep-15 | National Swimming Championships 2015 | Huang Shan | CHN |
| 7-Oct-15 | 10-Oct-15 | The 6th CISM World Games | Gimcheon | KOR |
| EUROPE | ||||
| Start | End | Event Name | City | Fed. |
| 6-Mar-15 | 8-Mar-15 | SU International/Dave McCullagh Memorial | Bangor | IRL |
| 12-Mar-15 | 15-Mar-15 | Swiss National Championships 2015 – Longcourse | Geneva | SUI |
| 14-Mar-15 | 15-Mar-15 | MM Ravne 2015 | Ravne | SLO |
| 19-Mar-15 | 22-Mar-15 | National Championships | Rijeka | CRO |
| 21-Mar-15 | 22-Mar-15 | Finnish Grand Prix, part 3 | Espoo | FIN |
| 22-Mar-15 | 23-Mar-15 | SH Actavis International Open | Hafnarfjörour | ISL |
| 1-Apr-15 | 4-Apr-15 | Budapest Championship | Budapest | HUN |
| 2-Apr-15 | 5-Apr-15 | Eindhoven Swim Cup/National Championships | Eindhoven | NED |
| 4-Apr-15 | 4-Apr-15 | To Sarajevo with Love | Sarajevo | BIH |
| 14-Apr-15 | 18-Apr-15 | National Spring Championships | Riccione | ITA |
| 15-Apr-15 | 18-Apr-15 | Open Championships of Belarus | Brest | BLR |
| 20-Apr-15 | 19-Apr-15 | Swedish Grand Prix 3 | Jonkoping | SWE |
| 22-Apr-15 | 26-Apr-15 | Finnish National Championships | Vaasa | FIN |
| 22-Apr-15 | 26-Apr-15 | VI International Swimming Meeting | Banja Luka | BIH |
| 24-Apr-15 | 26-Apr-15 | Marienlyst Open 2015 | Drammen | NOR |
| 30-Apr-15 | 3-May-15 | Irish Open Swimming Championships | Dublin | IRL |
| 8-May-15 | 10-May-15 | CIJ Meet – 8-10 May 2015 | Luxembourg | LUX |
| 8-May-15 | 10-May-15 | Ethias Swimming Trophy | Charleroi | BEL |
| 9-May-15 | 10-May-15 | Antwerp Diamond Speed Race | Antwerp | BEL |
| 15-May-15 | 17-May-15 | Belgian Open Swimming Championships | Antwerp | BEL |
| 21-May-15 | 22-May-15 | 41st Ljubljana City Cup | Ljubljana | SLO |
| 23-May-15 | 24-May-15 | 40th Ljubljana City Cup | Ljubljana | SLO |
| 27-May-15 | 30-May-15 | IV Gyor Open | Gyor | HUN |
| 30-May-15 | 31-May-15 | 8th International Swimming Championships ‘Banja Luka Open 2015’ | Banjaluka | BIH |
| 6-Jun-15 | 7-Jun-15 | Slovenia Swimming Federation | Kranj | SLO |
| 12-Jun-15 | 14-Jun-15 | 52 Trofeo ‘Sette Colli’ | Rome | ITA |
| 13-Jun-15 | 14-Jun-15 | HPS GP Sisak | Sisak | CRO |
| 27-Jun-15 | 4-Jul-15 | National Championships 2015 | Gyor | HUN |
| 30-Jun-15 | 2-Jul-15 | 40th Cyprus National Championships | Limassol | CYP |
| 1-Jul-15 | 5-Jul-15 | Swedish Championships | Sundsvall | SWE |
| 3-Jul-15 | 5-Jul-15 | Summer Swiss National Championships 2015 – Longcourse | Worb | SUI |
| 3-Jul-15 | 5-Jul-15 | Finnish Grand Prix Challenge | Helsinki | FIN |
| 4-Jul-15 | 5-Jul-15 | 11th Luxembourg Open Nationals | Luxembourg | LUX |
| 4-Jul-15 | 5-Jul-15 | HPS GP Golden Bear | Zagreb | CRO |
| 8-Jul-15 | 12-Jul-15 | Spanish Open – National Championships of Summer | Barcelona | ESP |
| 12-Jul-15 | 12-Jul-15 | KNZB Challenger Alkmaar | Eindhoven | NED |
| 15-Jul-15 | 18-Jul-15 | Open Cup of Belarus | Brest | BLR |
| 16-Jul-15 | 19-Jul-15 | 70th Austrian National Championships 2015 | Linz | AUT |
| 18-Jul-15 | 19-Jul-15 | 39th International Swim Meet Telekom 2015 | Radovljica | SLO |
| 18-Jul-15 | 20-Jul-15 | National Championships | Zagreb | CRO |
| 22-Jul-15 | 25-Jul-15 | Junior national Championships | Eger | HUN |
| 24-Jul-15 | 26-Jul-15 | Belgian National Swimming Championships | Charleroi | BEL |
| 24-Jul-15 | 9-Aug-15 | 16th FINA World Championships 2015 | Kazan | RUS |
| 6-Aug-15 | 9-Aug-15 | Age Group National Championship Slovenia Open | Kranj | SLO |
| 16-Oct-15 | 18-Oct-15 | International Swim Meeting ‘Youth for Youth’ | Sarajevo | BIH |
| 5-Dec-15 | 6-Dec-15 | Espoo Swim Games | Espoo | FIN |
| 11-Dec-15 | 12-Dec-15 | Amsterdam Swim Cup 2015 | Amsterdam | NED |
| 12-Dec-15 | 13-Dec-15 | International Meeting Maribor 2015 | Maribor | SLO |
| 16-Dec-15 | 19-Dec-15 | V Gyor Open | Gyor | HUN |
| 18-Dec-15 | 19-Dec-15 | National Winter Championships | Riccione | ITA |
| 18-Dec-15 | 20-Dec-15 | 12th International Meeting Castilia Castellon-Costa de Azahar | Castellon | ESP |
| tbc | tbc | SU International/Dave McCullagh Memorial | Bangor | IRL |
| 29-Jan-16 | 31-Jan-16 | 18th Euromeet | Luxembourg | LUX |
| 28-Apr-16 | 1-May-16 | Irish Open Swimming Championships | Dublin | IRL |
| OCEANIA | ||||
| Start | End | Event Name | City | Fed. |
| 6-Jul-15 | 11-Jul-15 | Pacific Games | Port Moresby | PNG |
