Abstract : The present study aimed to compare Soxhlet and maceration extraction methods on polyphenols and flavonoid contents, and evaluate antioxidant capacities. Polyphenols and flavonoid contents were determined using Folin-Ciocalteu and aluminum chloride colorimetric assay methods. The antioxidant activities were evaluated using DPPH, FRAP, and total antioxidant capacity (TAC) assays. Using the Soxhlet method, ethanol extract displayed the highest content of polyphenols (52.67 mg GAE/g DW) and flavonoids (68.17 mg QE/g DW). With the maceration method, methanol extract exhibited the highest polyphenols content (38.67 mg GAE/g DW), and ethanol extract had the highest flavonoid content (146 mg QE/g DW). Concerning the antioxidant activities, Soxhlet-methanol extract was the most efficient in the FRAP test (1.03 mg/ml). While the DPPH test showed the highest efficiency with Soxhlet-ethanol extract (0.37 mg/ml). Moreover, ethanol's total antioxidant capacity under Soxhlet was highest (408.3 mg AAE/g DW). These findings indicated that Lavandula stoechas exhibits significant promise as a potential source of antioxidants among natural plant resources.