Current study analyzed the socio-economic factors that impact farmers’ willingness to grow switchgrass and Miscanthus in Missouri and Iowa. The results of study show that current level of farmers’ willingness to grow either crop is low. Hence, there are barriers to accomplishing to goal of producing 21 billion gallons of cellulosic ethanol by 2022, as set by the Energy Independence and Security Act of 2007. The results of the ordered probit regressions show that farmers with higher education levels and smaller farm sales are more willing to grow energy crops. The results of this study show that currently growing energy crops is more attractive to small farms as a source of crop diversification, rather than an alternative crop production in the big scale by large farms.