| Rank | Event | Year | Location | Result |
| Olympic Games | ||||
| 3 | 400m Freestyle | 2008 | Beijing, CHN | 4:03.52 |
| 5 | 4 x 200m Freestyle Relay | 2004 | Athens, GRE | 7:59.11 |
| Semifinal | 200m Freestyle | 2008 | Beijing, CHN | 1:58.70 |
| Heats | 4 x 200m Freestyle Relay | 2008 | Beijing, CHN | 7:56.16 |
| Heats | 400m Freestyle | 2004 | Athens, GRE | 4:14.89 |
| World Championships | ||||
| 2 | 400m Freestyle | 2009 | Rome, ITA | 4:00.60 |
| 2 | 800m Freestyle | 2009 | Rome, ITA | 8:16.66 |
| 3 | 4 x 200m Freestyle Relay | 2009 | Rome, ITA | 7:45.51 |
| 4 | 200m Freestyle | 2009 | Rome, ITA | 1:55.88 |
| 6 | 4 x 200m Freestyle Relay | 2011 | Shanghai, CHN | 7:53.51 |
| Heats | 200m Freestyle | 2011 | Shanghai, CHN | 1:59.36 |
| European Championships | ||||
| 2 | 4 x 100m Freestyle Relay | 2010 | Budapest, HUN | 3:38.57 |
| 3 | 4 x 200m Freestyle Relay | 2010 | Budapest, HUN | 7:55.29 |
| 5 | 400m Freestyle | 2010 | Budapest, HUN | 4:09.14 |
Nickname
Jo. (British Swimming, 19 Jul 2010)
Hobbies
Shopping, going out for dinner, football, music - especially dance and R'n'B, going back to Yorkshire to see her family and friends, cars. (joannejackson.com, 2009; swimming.org, Jul 2009)
Occupation
Athlete
Language(s) spoken
English
Club name
ITC Loughborough, Loughborough, GBR
Coach
Ben Titley (GBR) (thisislondon.co.uk, 27 Feb 2012)
Position and style
Freestyle (British Swimming, 19 Jul 2010)
Other sports
Her sister Nicole Jackson swam in the 2000 Olympic Games in Sydney and won a gold medal at the World Championships in 2001. (joannejackson.com, 19 Jul 2010)
Debut
2003 for Great Britain, World Championships (Barcelona) (English Aquatics Team Media Guide, 2010)
Injuries
She has suffered frequently since 2009 with asthma attacks, chest infections, flu sinus problems and popped ribs, with her recently just getting over another chest infection two years later in 2011. This has left her unable to perform at her very best when the illnesses occur. Asthma is a recurring illness and could continue to affect her for the rest of her career. (morethanthegames.co.uk, 07 Nov 2011)
Additional information
Start of sporting career
She started swimming at the age of 10 and started taking it seriously at the age of 14. (chronicelelive.co.uk, 07 Feb 2006)
Reason for taking up this sport
Her sister was a swimmer and she looked up to her and wanted to be just like her. (English Aquatics Team Media Guide, 2010)
Ambitions
To win an Olympic gold medal and after her career she wants to be a police officer and to setup a swimming school. (English Aquatics Team Media Guide, 2010)
Training
Five or six hard sessions a week in the pool, plus gym work. (telegraph.co.uk, 22 Mar 2010)
Most memorable sporting achievement
Breaking the 400m freestyle world record in Sheffield in 2009 and winning the bronze medal in the same event at the 2008 Olympic Games in Beijing. (joannejackson.com, 2009)
Hero
Lance Armstrong and Steve Redgrave. (British Swimming, 19 Jul 2010)
Most influential person in career
Her sister Nicole Jackson and former coach Dave McNulty. (joannejackson.com, 2009; English Aquatics Team Media Guide, 2010)
Sporting philosophy / motto
"Train the way you want to compete." (Athlete, 31 Jul 2008)
General
FAMILY
She sometimes thinks it is a disadvantage to have a sister who was also an elite swimmer because of the expectations it creates. "Everyone is always comparing us," she said. "If she did it why can't I? That sort of thing." (chroniclelive.co.uk, 06 Mar 2008)
Previous Olympics
Beijing 2008, Athens 2004
