Abstract: This research, Uranium (²³⁸U), Thorium (²³²Th) and potassium (⁴⁰K) specific activity in Bq/kg were measured in 10 different types of milk that are available in Iraqi markets. The gamma spectrometry method with a NaI(Tl) detector has been used for radiometric measurements. Also, we have calculated the radiation hazard indices (radium equivalent activity and internal hazard index) and ingestion effective dose in all samples. It is found that the specific activity in milk samples were varied from 0.274±0.158-7.851±0.877 Bq/kg for ²³⁸U for ²³²Th from 0.821±0.273-3.067±0.569 Bq/kg and for ⁴⁰K from 266.558±5.018-485.740±7.197 Bq/kg. Also, it is found that the of radium equivalent activity and internal hazard index in milk samples ranged from 27.341-48.035 Bq/kg and from 0.07867-0.14720, respectively. But, the range of summation of the ingestion effective dose were varied from 4.861×10^–5-1.541×10^–4 Sv/y. This study proves that the natural radioactivity, radiation hazard indices and ingestion effective dose were lower than the safe, except the some value of potassium.