The company that runs the National Lottery increased its sales by €80m last year.
Annual returns from Premier Lotteries Ireland show Irish people spent €750m on lottery games in 2016.
Last year, €422m in prizes was won by players of Lotto, Euromillions and the company's other products.
The report says 2.1 million of all Irish adults played National Lottery games on a regular basis.
The company's annual returns also show it raised €213m for good causes last year, while 38 new millionaires were created, with players sharing overall prizes to the value of €422m.
The lucky winners included two syndicates who scooped EuroMillions jackpots.
A syndicate of friends who bought their ticket in Carlow won €66m, while 22 colleagues from Dublin Bus shared a €23.8m jackpot.