210Po, 210Pb, and 137Cs activities were measured using gamma and alpha spectrometry in commonly consumed seafood collected from the local fish market of Kenitra, Morocco. 210Po activity ranged from 0.76 to 182.5 Bq kg−1 w.w, while 210Pb and 137Cs activities were 1 and 4 Bq kg−1 w.w, respectively. The potential health risks associated with the consumption of seafood were assessed through the calculation of the committed effective dose, the daily intake, and the lifetime cancer risk. The obtained results of the committed effective dose were below the limit (1 mSv year−1), while the lifetime cancer risk exceeded the range of acceptable values.