The U.S. Census Bureau is preparing to field the 2020 Census Communications Campaign to encourage participation in the 2020 Census. Similar campaigns aided in maintaining high self-response rates for the 2000 and 2010 Censuses. To prepare, the U.S. Census Bureau fielded the 2020 Census Barriers, Attitudes and Motivators Study (CBAMS) sample survey to collect data on attitudes and knowledge about the U.S. Census. Data from over 17,000 respondents was used to classify individuals into one of six psychographic profiles referred to as Census “mindsets”. In social marketing campaigns, mindsets are constructed to reflect an individual’s knowledge, attitudes and opinions toward a topic. The mindsets are then used in developing messages with a call to action. In our case, the requested action is a response to the 2020 Census. Our research examines the feasibility of assigning a mindset to each record in a Big Data file, which is a third-party dataset containing over 250 million adult records and ultimately to households. The 2020 CBAMS variables used in determining the mindsets are not present on the third-party dataset although the dataset does contain over 500 variables that reflect demographics, socioeconomic status, attitudes and behavior. Our approach links the 2020 CBAMS survey records to the third-party dataset and then uses multinomial logistic regression with independent variables from the third-party dataset to predict the probabilities of the mindsets.