Abstract: Measurements of radon concentration, and effective dose rate were made for a number of 168 measurements of soil samples in some towns of the Gezira State in the central part of the Sudan. In this survey we used the can technique, containing CR-39, to estimate the radon concentration from the soils of: El-Hosh, Um-Turibat and Medani cities. The results of radon concentrations from soil samples in the selected areas were found to be 5.50 ± 0.75 kBq.m-3, 11.05 ± 4.95 kBq.m-3, 15.10 ± 1.47 kBq.m-3, while the effective dose was calculated to be from 24.51  3.32 mSv.y-1, 48.22  10.25 mSv.y-1 and 67.28  6.56 mSv.y-1, for El-Hosh, Um-Turibat and Medani towns, respectively. The results were compared with national and worldwide results.