The paper examines U.S. citizens' attitudes toward the concept of multifunctional agriculture and their perceptions about its various attributes. While the concept has emerged as a major narrative shaping agricultural policies and WTO trade rules, there are considerable disagreements among researchers and policy-makers about what should be considered legitimate attributes of multifunctional agriculture, preventing WTO negotiations from moving forward. Results show that U.S. citizens rated national food security and environmental services as the most important multifunctional roles of U.S. agriculture, and national food security makes the largest contribution to explaining U.S. citizens' attitudes toward multifunctional agriculture.