Ennis battled to Olympic Heptathlon gold in London last year to swoop the prize.
The 27-year-old set three personal bests and a British record of 6,995 points in London and is the second British woman to win the award after double Olympic champion Kelly Holmes triumphed in 2005.
"I don't think I'll have that kind of pressure again," Ennis told BBC Sport.
"It was a good experience, everything went well, and I'm sure it will be completely different for Rio."
Other awards included Team of the Year, which was awarded to the European Ryder Cup winners and World Sportsman of the Year went to Jamaican Usain Bolt for the third time after his triple gold of 100m, 200m and 4x100m in London.
Other Brits who received awards include the London 2012 chairman Sebastian Coe, who picked up the Lifetime Achievement Award, and Andy Murray with the World Breakthrough of the Year Award after his Olympic and US Open success.
The first Laureus awards were held in 2000 with ceremonies previously staged in London, Monaco, Portugal, Barcelona, Abu Dhabi and St Petersburg.
Proceeds from the Laureus World Sports Awards underpin the work of the Laureus Sport for Good Foundation, which supports 89 community sports projects around the world including 10 in the United Kingdom.
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