Apparent molar volumes and partial molar volumes at infinite dilution, V̅₂^o, for dipeptides (glycyl glycine, glycyl valine, glycyl leucine, glycyl phenylalanine, and glycyl asparagine) in aqueous sucrose and 2,3-butanediol solutions have been calculated from the measured densities in the temperature range of T = (283.15 to 333.15) K. Side-chain partial molar volumes, V̅_2,tr^o, and transfer volumes, ΔV_tr^o, for the dipeptides and side chains from water to aqueous additive environment have been calculated and analyzed in terms of possible solute−water, solute−cosolute, and cosolute−water interactions.