Some 175 pressure-volume-temperature data points in gaseous phase for trifluoroiodomethane (CF3I) have been measured using Burnett/isochoric methods. Burnett expansion measurements were made both at 353.15 K and at 323.15 K. Based on the pressure-volume relationships established both at 353.15 K and at 323.15 K isotherms, data were collected along isochores. Data along eight isochores were measured at the temperature range from 323.15 K to 393.15 K. Data along five isochores were measured at the temperature range from 278.15 K to 323.15 K. The pressure range is from 0.19 to 1.75 MPa. The maximum total temperature uncertainty in this work is estimated to be within +/- 10 mK, the maximum total pressure uncertainty in this work is estimated to be within +/- 500 Pa. The present data have been correlated with a virial equation of state. This equation has a root-mean-square deviation (RMS) deviation of 0.11% in pressure and a RMS deviation of 0.12% in density. The purity of the sample used in this work is 99.95 wt.% with 3.4 ppm of water.