The current record holder is Jamaican sprinter, Usain Bolt, who ran the 100-meter race in a blistering 9.58 seconds at the 2009 World Championships in Berlin. That bested his own world record of 9.69, which he had set the year before at the Beijing Olympics. The record-breaking margin of 0.11 seconds is also the largest since the start of digital race-time measurement.
The reigning women's Olympic 100-meter dash champion is Jamaica's Shelly-Ann Fraser, who won gold in Beijing with a time of 10.78 seconds and is generally considered the fastest woman in the world.
However, her time isn't close to the women's 100-meter world record of 10.49, set in 1988 by the late Florence Griffith-Joyner. Though some have suspected that this record was set while Joyner was using performance-enhancing drugs, the record has stood firm for 22 years.