This study presents a comparative analysis of natural radioactivity and radiological hazard parameters in core samples from the Titas and Rashidpur gas fields, Bangladesh, determined using a high-purity germanium (HPGe) detector. Six core samples from Titas (depths: 2713–2784 m) and four from Rashidpur (depths: 1454–2896 m) were analyzed for the activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K. The radionuclide concentrations in Titas range from 17 ± 2 to 64 ± 4 Bq/kg for ²²⁶Ra, 43 ± 3 to 109 ± 4 Bq/kg for ²³²Th, and 787 ± 47 to 2701 ± 70 Bq/kg for ⁴⁰K; while in Rashidpur, the concentrations of ²²⁶Ra range from 32 ± 3 to 52 ± 3 Bq/kg; those of ²³²Th, from 48 ± 3 to 88 ± 4 Bq/kg; and those of ⁴⁰K, from 660 ± 33 to 1737 ± 63 Bq/kg, both surpassing the global average significantly. Assessment of radiological hazard parameters indicates that some values in the Titas samples and a few in the Rashidpur samples exceed internationally recommended reference levels. These findings highlight the importance of continued monitoring and suggest that caution should be exercised when handling or utilizing materials from these gas fields for any purpose.