Thirty six samples of farm soils, taken to a depth of up to 30 cm in cultivated land, were collected over the Aden governorate south of Yemen region. Activity concentration of background radionuclides such as 226Ra, 232Th and 40K of these samples were determined by gamma-ray spectrometry with NaI (Tl) detector. The average concentrations in Bq.kg –1 dry weight of determined radionuclides 226Ra, 232Th and 40K were 48.01±3.84, 58.11±4.65 and 624.80±49.98 Bq.kg –1 for Beer Ahmed - Beer Fadle area farm soil. For Daar -saad -Al-Masabian area farm soil the corresponding values were 70.78±5.66, 84.75±6.78 and 771.53±61.72 Bq.kg –1, respectively. Radium equivalent (Raeq), dose rate, annual effective dose, and hazard indices (Hex and Hin) average values were (179.23, 251.38) Bq.kg–1, (82.98, 114.07) nGy h -1, (0.10, 0.14) mSv and (0.48, 0.68 and 0.61, 0.87). The results of the present study were discussed and compared with the results of similar investigations and internationally recommended values.