Significant progress has been made in recent years in both unpolarized structure functions of the nucleon as well as polarized structure functions. More recently, both experimental and theoretical studies of the structure of the nucleon have advanced beyond the one-dimensional collinear approximation, and three-dimensional descriptions of the nucleon structure both in momentum space, and longitudinal momentum-transverse space are becoming active areas of research. In this talk, I will review recent results on structure functions of the nucleon.