This study employed a probit model to identify the factors that influence the willingness of farmers in northern Ghana to adopt improved peanut varieties. A cross-sectional data of 206 peanut farmers from the Tamale Metropolitan, Tolon-Kumbungu and Savelugu-Nanton districts in the northern region of Ghana were used in the analysis. The estimated results indicate that Tolon-Kumbungu district (location), early maturity, farm size, ownership of a radio and membership in a farm organization significantly influence farmer willingness to adopt improved peanut varieties.