Prime focus of the present investigation was to evaluate hepatoprotective potency of Ocimum sanctum (O. sanctum) aqueous extract against butyl p-hydroxybenzoic acid (butylparaben) toxicity in mice. Oral treatment of butylparaben (1320 mg/kg b.w./day) to mice for 30 days resulted in significant (p < 0.05) elevation in hepatic lipid peroxidation, which could be due to significant (p < 0.05) reduction in non-enzymatic (glutathione and total ascorbic acid) antioxidant contents and enzymatic (superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase and glutathione transferase) antioxidants activities. Co-treatment of O. sanctum extracts in three different doses (100, 200 and 300 mg/kg b.w./day) resulted in significant (p < 0.05) reduction in butylparaben-induced hepatic changes. Oral administration of O. sanctum with butylparaben resulted in dose-dependent and significant (p < 0.05) reduction in lipid peroxidation as compared to butylparaben alone treated group. Similarly, all three doses of O. sanctum reduced butylparaben-induced changes in non-enzymatic and enzymatic antioxidants. The effect was significant (p < 0.05) and dose-dependent. All three doses of O. sanctum ameliorated butylparaben-induced changes, showing maximum protection at 300 mg/kg b.w./day dose. Results of present study indicate that butylparaben-induced hepatotoxicity involves its ability to induce oxidative stress, whereas antihepatotoxic effect of O. sanctum was mainly due to its antioxidative potency.