Excess volumes for four ternary mixtures have been measured at 303.15 K. The mixtures are N,N-dimethylformamide + methyl ethyl ketone + 1-propanol, + 1-butanol, + 1-pentanol, or + 1-hexanol. Excess volumes are negative for N,N-dimethylformamide + methyl ethyl ketone + 1-propanol and N,N-dimethylformamide + methyl ethyl ketone + 1-butanol over the entire range of composition. The measured ternary excess volume exhibits inversion in sign in the mixtures containing 1-pentanol and 1-hexanol. The measured data are compared with those predicted by empirical equations.