This study seeks to measure the digital divide and its impact on political participation in selected Arab countries. It focuses in particular on assessing the role of demographic and socio-economic status (SES) in unequal access to the Internet. A multivariate logistic regression analysis was used to predict political participation based on SES and internet use. Based on Arab Index data, the results of the analysis indicate that SES (gender, age, income and educational level) plays a major role in the level of Internet access, and that the purpose for which the Internet is used determines the likelihood of political participation. The results also indicate that vulnerable social groups are more reluctant to participate in political activities.