This paper reports 136 compressed liquid density measurements and 104 vapor phase PvT measurements of cis-1,2,3,3,3-pentafluoroprop-1-ene (R1225ye(Z)). The compressed liquid density data represent eight isotherms evenly spaced approximately from (283 to 353) K for pressures from close to saturation to 35 MPa, and the vapor phase PvT data represent six isochores for temperatures approximately from (263 to 368) K for pressures approximately from (135 to 777) kPa. The paper also presents a saturated liquid density correlation, a Tait correlation for the compressed liquid density data, and a Martin-Hou equation of state for the vapor phase PvT data.