The 2010 European Junior Swimming Championships were held from 14 to 18 July 2010 in Helsinki, Finland.[1] The Championships were organized by LEN, the European Swimming League, and were held in a 50 m pool. Ages for competitors, per LEN rules are: girls-15 or 16 years old; boys-17 or 18 years old.[2]
The 2010 Championships were held in the same country, and the week after, the 2010 European Junior Championships for diving (9-13 July in Helsinki, Finland) and synchronized swimming (7-11 July in Tampere, Finland). A 2010 European Junior Open Water Championships is also to be held; however, not in Finland, but rather in Hoorn, Netherlands on 31 July.
521 swimmers (279 boys, 242 girls) from 44 countries were entered in the event.[3] Teams were from (with total team size following name):
Armenia (1)
Austria (8)
Belarus (6)
Bulgaria (5)
Croatia (14)
Cyprus (1)
Czech Republic (5)
Denmark (17)
Estonia (15)
Faroe Islands (1)
Finland (29)
Greece (12)
Hungary (9)
Iceland (5)
Ireland (2)
Israel (11)
Latvia (7)
Lithuania (8)
Luxembourg (2)
Norway (10)
Poland (24)
Portugal (10)
Romania (5)
Serbia (14)
Slovakia (7)
Slovenia (16)
Sweden (20)
Turkey (15)
Ukraine (20)Five (5) countries were listed as attending, but without any swimmers: 
Albania, 
Azerbaijan, 
Liechtenstein,, and 
Montenegro.
Preliminary heats began at 9:00; Finals at 17:00. Prelims/semifinals/finals format used for events 200 m and under; prelim/finals used for events over 200 m. In 50 m events, prelims/semifinals/finals held on the same day; in 100 m and 200 m events, prelims/semis held on first day with finals the next event; and for 400 m+ events prelims/finals held the same day. Finals session order shown below.[4]
| Date | Wednesday 14 July 2010 | Thursday 15 July 2010 | Friday 16 July 2010 | Saturday 17 July 2010 | Sunday 18 July 2010 |
| E v e n t s | 50 breast (g) (semis) 50 fly (b) (semis) 400 IM (g) 200 breast (b) (semis) 200 fly (g) (semis) 400 free (b) 100 free (g) (semis) 100 back (b) (semis) 200 back (g) (semis) 50 fly (b) 50 breast (g) 1500 free (g) 4 × 100 free relay (b) | 100 back (b) 400 free (g) 200 fly (b) (semis) 200 fly (g) 200 IM (b) (semis) 100 free (g) 200 breast (b) 200 back (g) 100 free (b) (semis) 200 breast (g) (semis) 1500 free (b) 4 × 100 free relay (g) | 50 breast (b) (semis) 50 back (g) (semis) 200 fly (b) 200 free (g) (semis) 200 back (b) (semis) 200 breast (g) 100 free (b) 100 fly (g) (semis) 200 IM (b) 50 back (g) 50 breast (b) 800 free (g) 4 × 200 free relay (b) | 50 free (disability) 50 free (g) (semis) 50 back (b) (semis) 100 back (g) (semis) 100 fly (b) (semis) 200 free (g) 200 free (b) (semis) 100 breast (g) (semis) 200 back (b) 200 IM (g) (semis) 100 breast (b) (semis) 100 fly (g) 800 free (b) 50 free (g) 50 back (b) 4 × 200 freestyle (g) | 50 free (b) (semis) 50 fly (g) (semis) 400 IM (b) 100 back (g) 100 breast (b) 100 breast (g) 200 free (b) 200 IM (g) 100 fly (b) 50 fly (g) 50 free (b) 4 × 100 medley relay (g) 4 × 100 medley relay (b) |
| 50 m freestyle | Andriy Govorov | 22.54 | Jasper Aerents | 22.79 | Clement Mignon | 22.96 | |
| 100 m freestyle | Yannick Agnel | 48.80 | Mehdy Metella | 49.89 | Jasper Aerents | 50.23 | |
| 200 m freestyle | Yannick Agnel | 1:46.58 CR | Andrey Ushakov | 1:49.11 | Daniel Skaaning | 1:50.23 | |
| 400 m freestyle | Yannick Agnel | 3:46.26 CR, NR | Sergiy Frolov | 3:55.70 | Alfie Howes | 3:56.11 | |
| 800 m freestyle | Ediz Yıldırımer | 8:03.17 NR | Sergiy Frolov | 8:04.84 | Ward Bauwens | 8:07.25 | |
| 1500 m freestyle | Sergiy Frolov | 15:20.57 | Ward Bauwens | 15:27.04 | Ediz Yıldırımer | 15:31.07 | |
| 50 m backstroke | Christian Diener | 26.03 | Mateusz Zawada | 26.24 | Philipp Wolf | 26.26 | |
| 100 m backstroke | Yakov-Yan Toumarkin | 55.20 | Péter Bernek | 56.16 | David Gamburg | 56.58 | |
| 200 m backstroke | Péter Bernek | 1:59.24 | Balazs Zambo | 2:01.10 | Yakov-Yan Toumarkin | 2:01.14 | |
| 50 m breaststroke | Anton Lobanov | 28.37 | Yaroslav Parakhin | 28.51 | Ivan Capan | 28.56 | |
| 100 m breaststroke | Anton Lobanov | 1:01.06 | Sverre Naess | 1:01.91 | Christian vom Lehn | 1:02.56 | |
| 200 m breaststroke | Christian vom Lehn | 2:12.93 | Sverre Naess | 2:13.77 | Flavio Bizzarri | 2:13.93 | |
| 50 m butterfly | Andriy Govorov | 23.58 | Dmitry Pokotylo | 24.50 | Mehdy Metella | 24.62 | |
| 100 m butterfly | Marcin Cieślak | 53.91 | Mehdy Metella | 54.08 | Bence Biczó | 54.22 | |
| 200 m butterfly | Bence Biczó | 1:55.82 CR | Marcin Cieślak | 1:56.76 | Jordan Coelho | 1:57.57 | |
| 200 m individual medley | Raphaël Stacchiotti | 2:02.52 | Ieuan Lloyd | 2:02.72 | Ganesh Pedurand | 2:03.39 | |
| 400 m individual medley | Maksym Shemberev | 4:20.46 | Raphaël Stacchiotti | 4:21.28 | Zsombor Szana | 4:21.53 | |
| 4x100 m freestyle | Yannick Agnel Clement Mignon Lorys Bourelly Mehdy Metella | 3:19.65 | 3:23.97 | 3:24.54 | |||
| 4x200 m freestyle | Lorys Bourelly Clement Mignon Mehdy Metella Yannick Agnel | 7:21.40 | 7:26.09 | 7:26.91 | |||
| 4x100 m medley | Mikhail Zvyagin Anton Lobanov Dmitry Pokotylo Andrey Ushakov | 3:41.12 | 3:41.55 | 3:43.58 | |||
| 50 m freestyle | Nadiya Koba | 25.46 | Silke Lippok | 25.71 | Béryl Gastaldello | 25.98 | |
| 100 m freestyle | Silke Lippok | 55.31 | Mathilde Cini | 56.41 | Alizee Merdy | 56.55 | |
| 200 m freestyle | Silke Lippok | 2:00.11 | Henrietta Stenkvist | 2:01.72 | Valeriya Podlesna | 2:01.76 | |
| 400 m freestyle | Henrietta Stenkvist | 4:13.69 | Amalie Emma Thomsen | 4:14.61 | Sycerika Mc Mahon | 4:15.92 | |
| 800 m freestyle | Tjasa Oder | 8:40.06 | Claudia Dasca Romeu | 8:43.31 | Donata Kilijanska | 8:44.81 | |
| 1500 m freestyle | Claudia Dasca Romeu | 16:27.97 | Tjasa Oder | 16:37.98 | Donata Kilijanska | 16:39.03 | |
| 50 m backstroke | Emma Saunders | 29.01 CR | Daryna Zevina | 29.12 | Mathilde Cini | 29.42 | |
| 100 m backstroke | Daryna Zevina | 1:02.05 | Rachele Qualla | 1:02.72 | Karley Mann | 1:02.99 | |
| 200 m backstroke | Karley Mann | 2:11.48 | Daryna Zevina | 2:11.82 | Henrietta Stenkvist | 2:13.38 | |
| 50 m breaststroke | Lisa Fissneider | 32.20 | Lina Rathsack | 32.37 | Sara L Lougher | 32.48 | |
| 100 m breaststroke | Marina Garcia Urzainqui | 1:09.40 | Lisa Fissneider | 1:09.59 | Jenna Laukkanen | 1:10.42 | |
| 200 m breaststroke | Marina Garcia Urzainqui | 2:27.12 | Jenna Laukkanen | 2:29.67 | Anastasia Sineva | 2:30.00 | |
| 50 m butterfly | Nadiya Koba | 27.13 | Silke Lippok | 27.47 | Daria Tsvetkova | 27.62 | |
| 100 m butterfly | Rachael Kelly | 1:00.47 | Judit Ignacio Sorribes | 1:00.60 | Beatrice Fassone | 1:00.64 | |
| 200 m butterfly | Judit Ignacio Sorribes | 2:12.30 | Rachael Kelly | 2:13.43 | Alisa Trukhanovich | 2:15.03 | |
| 200 m individual medley | Sophie Smith | 2:14.48 | Beatriz Gomez Cortes | 2:14.65 | Juliane Reinhold | 2:15.16 | |
| 400 m individual medley | Sophie Smith | 4:44.46 | Beatriz Gomez Cortes | 4:44.87 | Alessia Polieri | 4:46.71 | |
| 4x100 m freestyle | Juliane Reinhold Teresa Baerens Silke Lippok Alexandra Wenk | 3:46.04 | 3:46.60 | 3:48.21 | |||
| 4x200 m freestyle | Elisa Thimm Juliane Reinhold Silke Lippok Johanna Friedrich | 8:06.78 CR | 8:10.21 | 8:15.37 | |||
| 4x100 m medley | Silke Lippok Lina Rathsack Juliane Reinhold Alexandra Wenk | 4:08.29 | 4:09.48 | 4:13.41 | |||