The Jamaican superstar won with a time of 9.81 seconds and claimed his Olympic hat-trick of wins in the discipline adding to his titles in Beijing 2008 and London 2012.
American Justin Gatlin had to settle for silver while Canada’s Andre de Grasse won the bronze.
It is Bolt’s seventh career Olympic gold medal.
Wayde Van Niekerk of South Africa smashed the world record en route to winning the 400m gold medal.
Niekerk, running in lane eight, stopped the clock at 43.03 seconds to beat Michael Johnson’s 17 year old record by 15 hundredths of a second.
Grenada’s Kirani James took silver with USA’s LaShawn Merritt third. (Euronews)