The relationship between demographic trends and political participation is seldom overlooked, as even minute movements within the population can result in the systematic alteration of behavior among the American electorate. Throughout the past two decades, the United States has experienced consistent growth in the number of multigenerational households, seemingly correlated with cultural and economic changes across the country. According to one Census report, more than 4.3 million households, or roughly 5.6% of all households in the United States, are multigenerational. Surprisingly, the political behavior of such a significant demographic subgroup has yet to be analyzed in any meaningful way. It is unknown if and how such households differ from traditional households with regard to political participation and engagement. Using data from the Integrated Public Use Microdata Series Current Population Survey (IPUMS-CPS) Voter Supplement for years 2000-2016 and Civic Engagement Supplement for the years of 2008-2011 and 2013, I am able to identify the individuals living in multigenerational households and assess their propensity to engage in a variety of political acts. Across a multitude of regression models and specifications of participation, I show that those living in multigenerational households participate at a significantly lower rate than those living in traditional households controlling for key demographics variables that have previously been shown to influence participation. Additionally, the panel structure of the IPUMS-CPS microdata creates the unique opportunity for a conditional differences-in-differences analysis with matching, so those who were not living in a multigenerational household at time t but were in time t + 1 can be compared to similar individuals who don't live in such a household in either time period. Those living in multigenerational households vote at a lower rate in presidential, midterm, and local elections, and are also less likely to engage in other forms of political engagement such as talking to family about politics, contacting an elected official, and being a part of organizations.while also explaining exactly why each subgroup participates at the observed rates (Brady, Verba and Schlozman, 1995;Dahan and Monogan, 2016;Gerber, Green and Larimer, 2008;Hopkins and Williamson, 2012;Rosenstone and Hansen, 1993). In order to do this, such literature must achieve two goals. First, identify the subgroups of people, usually based on groupings of similar demographic characteristics, that behave significantly different from one another, and second, uncover what actually causes these groups do behave as they do. Such knowledge is relevant not only for political scientists who desire to understand and explain how the political system works, but for politicians who are running for office or creating targeted policy to influence the behavior of specific people. (Green, 2015;Holbrook and McClurg, 2005).Being able to accurately determine which groups of people are more or less likely to parti...