This study examined the relationship among learners' motivation, gender, and completion of MOOCs in Saudi Arabia. Keller's ARCS motivation model was used as the theoretical framework. In this non-experimental survey study, 238 Saudi learners of MOOCs completed the Instructional Materials Motivation Survey (IMMS).             Chi-square tests, independent samples t-tests, multiple regression, and         logistic regression were used to analyze the data. The findings showed a low dropout rate and a significant relationship between gender and motivation in MOOCs. Also, females indicated higher motivation levels than males. In addition, there was a positive relationship between learners' motivation and completion of MOOCs.