Display omitted •gCN (graphitic carbon nitride) can be used in many areas such as sensing, biomedical applications, wastewater and environmental treatment•gCN synthesized from different ratios of urea and thiourea (0, 25, 50, 75 and 100%) were produced and their radiation shielding properties were investigated via NaI(Tl) (ORTEC® 905-4) detector system.•From obtained radiation shielding results, gCN provides effective results in radiation shielding. Graphitic Carbon Nitride (gCN) can be used in many fields such as sensing, solar energy and device construction. In this study, gCN obtained from urea and thiourea precursors were produced to determine the radiation shielding properties. The structural features and optical properties of these produced samples were investigated. Also, the radiation shielding properties were determined experimentally. Here, Linear Attenuation Coefficient values were determined experimentally and Mass Attenuation Coefficient, Half-Value Layer, Tenth-Value Layer and Mean Free Path values were calculated employing this value. According to obtained results, it is seen that obtained gCN can be used effectively in radiation shielding.