 | 400m femenino con 15 años |
| Tiempo | Nadador | Año | Localización |
| 04:58.50 | Carla Faro Martínez | 2018 | BARCELONA |
| 05:00.93 | Carla Faro Martínez | 2018 | SANTAISABEL |
| 05:05.29 | Carla Faro Martínez | 2018 | BATALLONES |
| 05:05.98 | Sofía C. González | 2021 | PALMA MALLORCA |
| 05:16.81 | Naroa Estévez Montes | 2023 | CASTELLÓN |
| 05:20.06 | Naroa Estévez Montes | 2023 | RIAZOR |
| 05:23.06 | María Quintas Melón | 2025 | CARBALLO CALERO |
| 05:24.27 | Uxia González Covelo | 2021 | FLUVIAL |
| 05:25.38 | Naroa Estévez Montes | 2023 | FRIGSA |
| 05:27.81 | Andrea D. Casabella | 2018 | RCNV |
| 05:31.45 | Angela Cobelo Represas | 2019 | RÍAS DO SUR |
| 05:35.25 | Iria González Covelo | 2019 | A CAÑIZA |
| 05:35.96 | Iria González Covelo | 2019 | RCNV |
| 06:02.34 | Laura Blanco Pérez | 2019 | ÁLVARO PINO |
| 06:09.96 | Laura Costa Fernández | 2016 | RIASDOSUR |
| 06:39.72 | Julia Aliaga Pérez | 2025 | AS POZAS |