Editing Marjorie Jackson-Nelson (section)

=== 1952 Summer Olympics ===
[[File:Winnaressen dames 200m Puck Brouwer, Bestanddeelnr 905-2385 (cropped & rotated).jpg|thumb|Jackson (centre) with [[Bertha Brouwer]] and [[Nadezhda Khnykina-Dvalishvili|Nadezhda Khnykina]] following the [[Athletics at the 1952 Summer Olympics – Women's 200 metres|200 meters at the 1952 Summer Olympics]]]]
Following the 1950 Games, Jackson came to the [[1952 Summer Olympics]] as a favourite.{{Citation needed|date=September 2023}} On the plane to Helsinki, she won fellow Australian Olympian [[Peter Nelson (cyclist)|Peter Nelson]]. She won gold in the 100 m, in a then-world-record-equalling time of 11.5, with a margin of almost four metres, then the greatest winning margin in the history of the Olympics women's 100 m. Second place was won by Daphne Robb-Hasenjager, of South Africa, and third place was Shirley Strickland, also from Australia. In the 200 m, Jackson set world records of 23.6 seconds in the third heat and of 23.4 seconds in the semi-finals, before ultimately winning the gold medal with a time of 23.7 seconds. Second and third place went to Bertha Brouwer of the Netherlands and Nadezhda Khnykina of the Soviet Union respectively.<ref name=":0" /> 
Jackson was the anchor in the Australian 4 × 100 m relay, with a team made up of Strickland, Johnston, and Winsome Cripps. The team won the first heat of the relay with a world record beating time of 46.1 seconds.<ref name=":0" /><ref>{{Cite news |date=1952-07-28 |title=AUSTRALIA LOSES WOMEN'S RELAY AS BATON FALLS |pages=1 |work=Canberra Times (ACT : 1926 - 1995) |url=http://nla.gov.au/nla.news-article2860489 |access-date=2019-05-12}}</ref> The team were expected to win but during the final handoff of the relay baton, Jackson's hand hit Cripp's knee and she dropped the baton. The American team, anchored by [[Catherine Hardy Lavender]], won in an upset, setting a new world record time of 45.9 seconds.<ref name="r1" /><ref name=":0" /> The team ultimately placed fifth.<ref name=":0" />

Jackson was the first Australian woman to win an Olympic gold medal in athletics and the first person to win an Olympic gold medal in athletics for Australia since [[Edwin Flack]] in 1896. After the Olympics, the song "Our Marjorie" by [[Jack O'Hagan]] appeared in the charts. Upon her return from Helsinki, she rode from Sydney Airport to Lithgow, a journey of more than 150&nbsp;km, in an open-topped car.<ref name=":0" /><ref>{{cite book |last1=Van Straten |first1=F |title=O'Hagan, John Francis (1898–1987) |chapter=John Francis O'Hagan (1898–1987) |chapter-url=http://adb.anu.edu.au/biography/ohagan-john-francis-15406 |accessdate=7 December 2014 |website=Australian Dictionary of Biography|publisher=National Centre of Biography, Australian National University }}</ref> At a meet on October 4, 1952, at Gifu, Japan, Jackson broke the 100 m world record with a time of 11.4 seconds. She was awarded the title of The Outstanding Athlete of 1952 by the Helms Foundation.<ref name=":0" /><ref name="r4" />