Prevotella intermedia and Porphyromonas gingivalis were resistant to aqueous extracts while Aggregatibacteractinomycetemcomitans was inhibited at very high cncentrations. Hot ethanolic extracts showed significantly higher zoneof inhibition than cold ethanolic extract.Minimum inhibitory concentration of hot and cold ethanolic extracts of Citrus sinensis peel ranged between 12-15 mg/mlagainst all three periodontal pathogens