In this study, the tomography of Rayleigh waves in the Central Alborz region (latitude 34.5-38⸰N degrees and longitude 48.5-54.5⸰ E degrees) has been investigated by transdimensional tomography. This method adapts to a non-uniform data coverage without requiring arbitrary regularization such as damping or smoothing. The data includes the dispersion curve obtained from ambient noises by applying seismic interferometry, as well as the data of the earthquakes. Seismic interferometry is an efficient method in seismological studies that estimate the response between two seismic stations using cross-correlation. The results from seismic tomography in this study show the possibility of separating different tectonic seismic regions based on velocity anomalies and the cooled Damavand magma at a depth of about 20 km.