She represented her country at the Olympic Games for three consecutive times in 2008 Beijing, 2012 London, and 2016 Rio de Janeiro.

Competing alongside Bing Huang, the pair beat second seeds Eva Lee and Mesinee Mangkalakiri of the United States 21–15, 9–21, 21–11 in the final.

She became the first ever Irish woman to win a badminton match at the Olympics,[8] beating Estonian Kati Tolmoff by a score of 18–21, 21–18, 21–19 in the first round of the women's singles.

[8] In 2009, Magee competed at the World Championships in Hyderabad, India, losing in the first round to Japanese number two Ai Goto by a score of 21–13, 21–9.

She beat Slovakian Monika Fasungova, 21–17, 20–22, 21–5, in the quarter-finals and Russia's Romina Gabdullina, 21–15, 17–21, 21–15, in the semi-finals but finished runner-up after losing to Poland's Kamila Augustyn, 21–19, 14–21, 14–21, despite having a 10–6 lead in the final set.

[14] Bill O'Herlihy sparked controversy while covering Chloe Magee's progress at the 2012 Summer Olympics by suggesting badminton was "a mainly Protestant sport".