The heat capacity of manganese monophosphide (MnP) has been determined by adiabatic shield calorimetry at temperatures from 5K to 840K. The heli- to ferromagnetic transition is noted only as a slightly enhanced heat capacity at T approximate to 53K. A h-type heat capacity contribution with maximum at T= 289.5K is related to the transition from ferro-to paramagnetism in the compound. The clearly cooperative part of the transitional entropy is only 1.27J.K-1.mol(-1) over the region T=220 K to T=400 K. Less cooperative magnetic/electronic contributions are present. The overall estimated transitional entropy amounts to 5.2 J+K-1 mol(-1) at T=800 K. Values of the thermodynamic properties at T = 298.15 K and T = 800 K are: