The survey also found the majority (78%) of World Cup bettors say it is important for them to place their bets legally.
The American Gaming Association forecasted that over $7.6 billion will be wagered on pro football's championship game.
Sportsbooks had a unique opportunity Thursday night as four major sports leagues held games, including the first NFL game of the season.
The Nevada Gaming Control Board released figures showing that $154.7 million was wagered in Nevada's sports books.
A customer at the William Hill Sports Book inside Casino Royale in Las Vegas turned a $5 wager into a $100,000 jackpot when he went a perfect 15-for-15 on the William Hill $100,000 Parlay Card.
The World Series started Tuesday with the Boston Red Sox hosting the Los Angeles Dodgers at Fenway Park. That means more bettors at the sportsbook..
State regulators say Nevada gambling revenue increased almost 7.5 percent in March from the same time last year. The Nevada Gaming Control Board on Wednesday reported that casinos brought in more than $991 million last month.
The 2015 NCAA tournament will host 68 teams in a bracket style competition.