Solid state nuclear track detectors are increasingly being used to obtain the radon concentration in soil of some regions of Iraq. Several samples of soil were collected from Al – Anbar, Wasit, Diayala and Baghdad nearby sites to evaluate the radon concentration. CR – 39 plastic track detectors was used as a measurement device with cylindrical diffusion Technique. Results shows higher concentration was recorded in Al – Ramadi city which was equal to 143.1 Bq/m3, while the lower radon concentration was found in Diayala governorate which was equal to 21.504 Bq/m3. By making a comparison between results and the permissible limits of radon concentration in soil of ICRP, we found that all sites of the study are in agreement with the permissible limits.