Effective temperature measurement using a non-invasive temperature sensor is important in the healthcare industry. This study presents the finite element analysis for the performance of a Polypyrrole thin film as a sensing element for a temperature sensor design. The results were discussed based on analytical methods and simulation in COMSOL Multiphysics. The PPy thin film performance was investigated by employing the current–voltage (I/V) relationship at room temperature condition. Next, the PPy thin film was simulated with a variation of temperature in a range at room temperature condition and at a range of temperature starting from 30 to 41 ºC at the bottom part of the film to obtain its resistance–temperature (R/T) relationship. The electrical characteristics in terms of resistance values comparisons were also presented with respect to different shapes and sizes. Overall findings shows that the square shaped PPy thin film geometry design of 25.4 mm (length) × 25.4 mm (width) × 2.943 µm (thickness) can be used a temperature sensor. The I/V plot obtained is linear. The R/T plot suggests the PTC (positive temperature coefficient) temperature sensing characteristics. Comparative studies show that different shapes and sizes of the PPy film will give different electrical characteristics. It can also be stated that the increase in sensor size will increase the value of sensor’s conductivity.