ABSTRACT: Applied geothermometry is one of the major tools in exploring and developing geothermal resources. This procedure readily estimates reservoir temperatures using the chemical and isotopic composition of discharges from wells, natural springs and fumaroles. The geothermic conditions of geothermal aquifers are determined by measuring the geothermal water temperature in existing deep boreholes, or alternatively, geothermometers can be used to estimate the reservoir geothermal water temperature. Here, chalcedony and α-cristobalite geothermometers were chosen as most suitable for the Poprad Basin conditions; so these were used in the following five geothermal boreholes; PP-1 Poprad, VSC-1 Veľký Slavkov, FGP-1 Stará Lesná, Vr-1 Vrbov and Vr-2 Vrbov. The Pre-Palaeogene Poprad Basin basement temperature varied from 40 °C to 117 °C; with the highest temperatures recorded between 3,200 and 3,300 m depth. The temperatures estimated using geothermometers were then compared with the actual geothermal water temperatures.