Bolt previously won the coveted award for the years, 2008, 2009, and 2011 to 2013.
In August of this year, Bolt became the first person in history to win gold in the 100 metres, 200m and 4x100m at a third straight Olympic Games in Brazil.
Bolt received the accolade despite decent competition from Mo Farah and Wayde van Niekerk.
Following the announcement, Bolt posted on Instagram:
“Thank you all!!!! Honoured to be your @iaaf Athlete of the Year for the sixth time #Blessed #Humbled.”
Ethiopia’s female long distance runner Almaz Ayana was named Female World Athlete of the Year.