In recent years, Twitter has become a popular online platform where citizens can discuss politics. However, these conversations may take an uncivil turn, and the consequences could be damaging to democracy. One such uncivil behavior on Twitter is trolling, a disruptive online activity geared toward luring others into pointless and time-consuming discussion. Disruptive messages can have severe consequences for the deliberative system in democratic societies and could frustrate the development of a public sphere. This study explores Twitter trolls during the contentious 2012 Parliamentary election in Catalonia, an autonomous region in Spain. Using Gnip’s firehose, all tweets containing the word “independence” or the hashtag “#25N” from the four weeks preceding the election were captured for analysis, which generated a corpus of 325,888 tweets. Results based on automated and manual content analysis show that the prevalence of successful trolls was at 0.01%, thus indicating that they were scant despite the controversy surrounding the issue of independence. The study also contributes to the identification of successful Twitter trolls and discusses the democratic implications of trolling on Twitter.