Introduction: Dental caries is irreversible microbial disease-causing cavitation. It is necessary to restore the cavitated carious lesion with suitable restorative materials. Choice of restorative materials is depending on mechanical properties and biocompat ibility. Objectives: This study was done to compare the mechanical properties (compressive strength (CS) and diametral tensile strength (DTS)) of GIC, Cention-N and nanohybrid composite restorative materials. Methods: Thirty specimens with 10 in each group were prepared from Glass Ionomer Cement (GIC), Cention-N and nanohybrid composite restorative materials for testing compressive strength and DTS. Results obtained were statistically evaluated by one way ANOVA and Tukey__ampersandsignrsquo;s post hoc test at significance (p __ampersandsignlt; 0.001). Results: We observed highest mean compressive strength for Cention-N 248.52__ampersandsignplusmn;4.28MPa, followed by 203.11__ampersandsignplusmn;1.35 MPa in Nano hybrid composite and least for GIC i,e 157.32__ampersandsignplusmn;1.58 MPa, which is statistically significant (P__ampersandsignlt; 0.001). Highest mean diame tral tensile strength was observed with Cention-N (108.63.76__ampersandsignplusmn;1.73 MPa) followed by Nanohybrid composite (92.54__ampersandsignplusmn;1.21MPa) and least with GIC (54.28__ampersandsignplusmn;1.12MPa) which is statistically significant (P__ampersandsignlt;0.001). Intergroup comparison of compressive and diametral tensile strength was highly significant 0.001. Conclusion: This study indicates the highest compressive and tensile strength with Cention N followed by hybrid composite, and GIC restorative materials.