The 2012 presidential election in Mexico is significant for many reasons, not least of which is that it returned the Partido Revolucionario Institucional to power after two Partido Acción Nacional administrations. This essay reviews more than 50 surveys taken before and during the election to determine significant patterns among Mexican voters, comparing the most influential traditional and non-traditional demographic variables, as well as other variables such as partisanship and policy issues in this election, with those of the two previous presidential races. It also analyses other influential variables in the 2012 presidential race, including social media and the application of new electoral legislation. It identifies significant differences and similarities among voters today in contrast to the two prior elections, and suggests long-term patterns among Mexican voters which are likely to influence voting behaviour in future elections, ranging from regionalism and gender to partisanship and social media.