New Zealand at the 2013 World Aquatics Championships
New Zealand competed at the 2013 World Aquatics Championships in Barcelona, Spain between 19 July and 4 August 2013.
Medalists
Open water swimming
New Zealand qualified four quota places for the following events in open water swimming.| Athlete | Event | Time | Rank |
| Kane Radford | Men's 5 km | 53:44.3 | 18 |
| Kane Radford | Men's 10 km | 1:49:43.0 | 20 |
| Phillip Ryan | Men's 5 km | 56:17.5 | 38 |
| Phillip Ryan | Men's 10 km | 1:51:11.3 | 45 |
| Phillip Ryan | Men's 25 km | 4:50:57.2 | 18 |
| Cara Baker | Women's 5 km | 56:46.2 | 6 |
| Cara Baker | Women's 10 km | 1:58:38.5 | 23 |
| Emma Robinson | Women's 5 km | 57:29.5 | 24 |
| Emma Robinson | Women's 10 km | 2:01:47.6 | 34 |
| Kane Radford Phillip Ryan Cara Baker | Mixed team | 56:12.0 | 9 |
Swimming
New Zealand swimmers achieved qualifying standards in the following events :;Men
;Women
Synchronized swimming
New Zealand has qualified twelve synchronized swimmers.Water polo
Men's tournament
;Team roster- Thomas Kingsmill
- Matthew Lewis
- Stefan Curry
- Finn Lowery
- Jonathon Ross
- Andrew Sieprath
- Daniel Jackson
- Matthew Small
- Eamon Lui-Fakaotimanava
- Matthew Bryant
- Lachlan Tijsen
- Adam Pye
- Dylan Smith
| Pld | W | D | L | GF | GA | GD | Pts | |
| 3 | 3 | 0 | 0 | 38 | 15 | +23 | 6 | |
| 3 | 2 | 0 | 1 | 34 | 12 | +22 | 4 | |
| 3 | 1 | 0 | 2 | 30 | 18 | +12 | 2 | |
| 3 | 0 | 0 | 3 | 8 | 65 | −57 | 0 |
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;Round of 16
Women's tournament
;Team roster- Brooke Millar
- Emily Cox
- Kelly Mason
- Nicole Lewis
- Alexandra Boyd
- Lynlee Smith
- Sarah Landry
- Danielle Lewis
- Lauren Sieprath
- Casie Bowry
- Kirsten Hudson
- Alexandra Myles
- Ianeta Hutchinson
| Pld | W | D | L | GF | GA | GD | Pts | |
| 3 | 3 | 0 | 0 | 45 | 10 | +35 | 6 | |
| 3 | 2 | 0 | 1 | 35 | 21 | +14 | 4 | |
| 3 | 1 | 0 | 2 | 22 | 35 | −13 | 2 | |
| 3 | 0 | 0 | 3 | 10 | 46 | −36 | 0 |
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;Round of 16