Online poker is one of the fastest growing forms of online gambling yet there has been relatively little research to date. This study comprised 422 online poker players (362 males and 60 females) and investigated some of the predicting factors of online poker success and problem gambling using an online questionnaire. Results showed that length of time as a player was positively correlated with the number of days playing per year, length of poker sessions, and financial success. However, length of time playing did not correlate with either score on DSM-IV problem gambling criteria or perceived skill. Using a stepwise multiple regression, predictors of winning play and financial success among the online players were examined. Those players who were more likely to have financial success were: (1) disciplined and avoided spending over their monthly gambling budget; (2) played at higher stake levels; (3) did not over-estimate the skill involved in poker; and (4) perceived themselves to be more skilful. A further multiple regression examined predictors of problem gambling. Results showed that problem online poker players were (1) more likely to swap genders when playing online; (2) undisciplined and spent over their allocated budget; and (3) played more frequently for longer periods of time. Even though there is some skill involved in poker, skill was not a predictor in problem gambling. These results are discussed along with implications from the findings for key stakeholders (i.e., the players, gaming industry, policy makers and researchers).