The decay of 205Hg to levels in 205T1 was investigated using Ge(Li) and NaI(T1) γ detectors. On the basis of energy, intensity, and coincidence measurements a new decay scheme is proposed. In addition to the first excited state at 203.7 +/- 0.2 keV seen in earlier decay studies, levels at 619.3 +/- 0.4, 1140.9 +/- 0.6, 1218.7 +/- 0.4, 1340.3 +/- 0.6, and 1433.9 +/- 0.5 keV were observed. Spin assignments and ft values are assigned to all levels. Our level scheme is compared with the results of recent reaction studies and with the predictions of a model that considers coupling between single-proton-hole states and vibrations of the core.