The speeds of sound u, densities ρ and refractive indices nD of homologous series of mono-, di-, and tri-alkylamines were measured in the temperature range from 298.15 to 328.15 K. Isentropic and isothermal compressibilities κS and κT, molar refraction Rm, Eykman’s constant Cm, Rao’s molar sound function R, thermal expansion coefficient α, thermal pressure coefficient γ, and reduction parameters P∗, V∗, and T∗ in frameworks of the ERAS model for associated amines and Flory model for tertiary amines have been calculated from the measured experimental data. Applicability of the Rao theory and the ERAS and Flory models have been examined and discussed for the alkyl amines.