4-Dimethylaminopyridine (DMAP) is an important catalyst. The thermodynamic properties of DMAP were investigated through differential scanning calorimetry, thermogravimetric analysis, adiabatic calorimetry, and combustion calorimetry. The low-temperature heat capacity (C-p,C- m) was measured in the temperature range from (80 to 402) K with a high-precision automated adiabatic calorimeter. The melting temperature (T-m), the molar enthalpy (Delta H-fus(m)), and the entropy (Delta S-fus(m)) of fusion were determined to be ( 387.094 +/- 0.002) K, ( 21.628 +/- 0.144) kJ . mol(-1), and (55.873 +/- 0.372) J . K-1 . mol(-1), respectively. The mole fraction purity of the sample used in the adiabatic calorimetric study was determined to be 0.99964 according to the Van't Hoff equation. The thermodynamic functions [H-T - H-298.15] and [S-T - S-298.15] were derived in the range from (80 to 400) K with temperature interval of 5 K based on the heat capacity measurements. The constant-volume energy and standard molar enthalpy of combustion have been determined, Delta U-c (C7H10N2, cr) = -(4232.20 +/- 0.60) kJ.mol(-1) and Delta H-c(m)0 (C7H10N2, cr) = -(4235.92 +/- 0.60) kJ.mol(-1), by means of a precision oxygen-bomb combustion calorimeter at T = (298.15 +/- 0.001) K. The standard molar enthalpy of formation has been derived, Delta H-f(m)0 (C7H10N2, cr) = (52.20 +/- 1.71) kJ.mol(-1), from the standard molar enthalpy of combustion in combination with other auxiliary thermodynamic quantities through a Hess thermochemical cycle.