| XXV South American U18 Championships in Athletics | |
| Size: | 200px |
| Host City: | Encarnación  |
| Dates: | 25 – 26 September |
| Stadium: | Estadio Comunal |
| Nations Participating: | 12 |
| Athletes Participating: | 360 |
| Events: | 39 |
| Records Set: | 2 CRs |
| Level: | Youth |
| Previous: | 2018 Cuenca |
| Next: | 2022 São Paulo |
The 25th South American U18 Championships in Athletics were held in Encarnación, Paraguay, on 25 and 26 September 2021.[1]
| 100 metres -1.3 m/s | Tomás Mondino | 10.59 | Renan Gallina | 10.65 | Enzo Barros | 10.93 | |
| 200 metres -1.1 m/s | Tomás Mondino | 21.94 | Jhumiler Sánchez | 22.14 | Juan Carlos Anaya | 22.28 | |
| 400 metres | Vinícius Galeno | 48.73 | Gabriel Tasca | 48.78 | Hector Broncano | 49.49 | |
| 800 metres | Gabriel dos Santos | 1:51.24 | Pedro Alejandro Marín | 1:53.00 | Samuel Guarín | 1:53.12 | |
| 1500 metres | Gonzalo Gervasini | 3:57.03 | David Preciado | 4:02.65 | Sebastián Dossow | 4:06.89 | |
| 3000 metres | Alexander García | 8:41.08 | Carlos Peñafiel | 8:42.99 | Nider Pecho | 8:44.57 | |
| 110 metres hurdles (91.4 cm) -1.2 m/s | Thiago dos Santos | 13.97 | Gustavo Cadan | 14.27 | Pedro Morales | 14.60 | |
| 400 metres hurdles (84 cm) | Leonardo Mendes | 53.41 | Javier Valentino Molet | 53.89 | Samuel dos Santos | 54.08 | |
| 2000 m steeplechase | Wilson Navarrete | 5:58.61 | Jeronimo Peralta | 6:04.31 | Bruno do Prado | 6:05.95 | |
| 4 × 100 metres relay | 41.41 | 41.56 | 41.78 | ||||
| 10,000 m track walk | Miguel Arcangel Peña | 45:27.90 | Julian Andrés Alfonso | 45:46.03 | João Victor Magalhães | 46:23.22 | |
| High jump | Cristobal Sahurie | 2.04 | Eron de Araújo | 1.95 | Brayan Ganan | 1.95 | |
| Pole vault | Aurelio Leite | 4.60 | Ricardo Montes | 4.60 | Pedro Henrique Aparecido | 4.30 | |
| Long jump | Matheus de Barros | 7.30 | Ezequiel Sferra | 6.96 | Jean Carlos Mosquera | 6.85 | |
| Triple jump | Vinícius de Freitas | 14.67 | Jarley Cuellar | 14.58 | Roy Chila | 14.50 | |
| Shot put (5 kg) | Darwin Meneses | 17.90 | Juan Anding | 17.39 | Javier Montejo | 16.22 | |
| Discus throw (1.5 kg) | Holman Villamizar | 54.13 | Matheus de Barros | 52.76 | Juan Anding | 52.49 | |
| Hammer throw (5 kg) | Tomás Olivera | 70.31 | Jean Carlos Ortiz | 69.45 | Cipriano Riquelme | 66.99 | |
| Javelin throw (700 kg) | Pablo Joan Frutos | 65.52 | Arthur Curvo | 63.92 | Yuri Benites | 61.52 | |
| Decathlon (U18) | Luiz Arthur Santos | 6342 | Vitor Lazarim | 6244 | Alejandro Romano | 5919 |
| 100 metres -1.0 m/s | Laura Martínez | 11.92 | Melany Bolaño | 12.00 | Suellen de Santanna | 12.17 | |
| 200 metres -1.4 m/s | Melany Bolaño | 24.73 | Marleth Ospino | 25.21 | Suellen de Santanna | 25.30 | |
| 400 metres | Martina Bonaudi | 57.39 | Ana Luiza dos Santos | 57.73 | Paola Loboa | 57.79 | |
| 800 metres | Anita Poma | 2:11.75 | Caroline Gomes | 2:13.64 | Julia Gonçalves | 2:14.06 | |
| 1500 metres | Danna Michel Pinchao | 4:44.58 | Ana Valerio | 4:47.04 | Stefany Ribeiro | 4:50.10 | |
| 3000 metres | Gabriela Tardivo | 10:02.39 | Lilian Mateo | 10:14.62 | Vanessa Alder | 10:22.91 | |
| 100 metres hurdles (76.2 cm) -1.5 m/s | María Alejandra Murillo | 13.66 CR | Lays Silva | 14.08 | Catalina Rozas | 14.23 | |
| 400 metres hurdles | Letícia de Oliveira | 59.33 CR | María Alejandra Murillo | 59.55 | Camille de Oliveira | 61.16 | |
| 2000 m steeplechase | Eunice Lescano | 7:19.63 | Amanda Silva | 7:27.60 | Jomayra Tite | 7:28.49 | |
| 4 × 100 metres relay | 46.18 | 46.61 | 48.06 | ||||
| 5000 m track walk | Natalia Pulido | 23:16.00 | Sara Encalada | 23:49.23 | Mariana Rincón | 24:23.86 | |
| High jump | Silvina Gil | 1.72 | Gabriela de Sá | 1.72 | Joaquina Dura | 1.63 | |
| Pole vault | Asunción Dreyfus | 3.60 | Julia Calabretti | 3.60 | Iraynelli Bravo | 3.55 | |
| Long jump | Vanessa dos Santos | 6.15 (w) | Nerly Cantoni | 6.14 | Ornelys Ortiz | 5.86 (w) | |
| Triple jump | Joaquina Dura | 12.52 | Beatriz dos Santos | 12.37 | Katerine Pinillo | 12.35 | |
| Shot put (3 kg) | Taniele da Silva | 14.64 | Alison Torres | 14.30 | Laira Ordoñez | 13.76 | |
| Discus throw | Florencia Dupans | 43.86 | Valentina Ulloa | 43.15 | Maria Eduarda de Matos | 41.45 | |
| Hammer throw (3 kg) | Catalina Rodríguez | 61.89 | Katerine Tantalean | 56.89 | Sara Antonia Vera | 55.30 | |
| Javelin throw (500 g) | Manuela Rotundo | 47.15 | Martina Prieto | 43.29 | Laira Ordoñez | 43.01 | |
| Heptathlon (U18) | Renata Godoy | 4983 | Sofhia Antonio | 4882 | María Paula Reinoso | 4591 |
| 8 × 300 metres relay | Ana Luiza dos Santos (W) Letícia de Oliveira (W) Nicole Domene (W) Camille de Oliveira (W) Vinícius Galeno (M) Gabriel Tasca (M) Samuel dos Santos (M) Leonardo Mendes (M) | 5:01.86 | Ignacio Cabrera (M) Mateo Duran (M) Joaquina Dura (W) Malena Gobbo (W) Helen Bernard (W) Abril Molina (W) Luis Batista (M) Tomás Mondino (M) | 5:07.17 | Samuel Guarín (M) Paola Loboa (W) Freddy Jiménez (M) Juan Carlos Anaya (M) Raúl Ararat (M) Marleth Ospino (W) Melany Bolaño (W) Laura Martínez (W) | 5:16.39 |