Similar effects were observed for the number of sports bets made, which declined with age. This gender difference varied with age, with the greatest difference found among the young. The probability of betting on sports decreased with increasing age and was lower for women and people with a university education. Survey responses from a sample of nearly 15,000 Australian sports fans were used to study the determinants of: (i) gambling behaviour, including if a person does gamble and the type of gambling engaged with (ii) the number of sports and non-sports bets made over a 12-month period and (iii) attitudes towards betting on sports.