The Cook Islands has competed at the IAAF World Athletics Championships on fifteen occasions, and did not send a delegation for the 1999 World Championships in Athletics. Its competing country code is COK. The country has not won any medals at the competition and as of 2017 no Cook Islands athlete has progressed beyond the first round of an event. Its best performance is by Tereapii Tapoki, who placed twentieth in women's discus throw qualifying in 2005.