An experiment was conducted under laboratory conditions to study the larvicidal and repellent activities against Aedes aegypti, and components of essential oil from Citrus sinensis fruit peel. The essential oil elicited variable toxicity against the 4th instar A. aegypti larvae. Maximum larval mortality of 90% was recorded at 100 ppm. Larvicidal potency (LC₅₀ 62.5 ppm) was less than that of endosulfan (LC₅₀ 0.76 ppm). Repellency at onset of application for all concentrations used (0.5-25%) decreased with time, leaving approximately 50% repellency up to 2 hours for the 10 and 15% products, and up to 4 hours for higher concentrations. Fumes from citrus peel elicited variable toxicity against adult A. aegypti upon fumigation. Maximum mortality of 91% was recorded at 24 h and was comparable with that of the positive control. Similarity in composition of the hydrodistilled oils from both fresh and dried fruit peels was observed. Thirty compounds covering the terpene and non-terpene groups were identified. The terpenoid category of compounds comprise the monoterpene hydrocarbons representing 90.3 and 98.1%, respectively, in both the fresh and dried fruit peel samples. Among the oxygenated monoterpenes (6.8 and 2.1%, respectively, in the fresh and dried peel oils), linalool was the most abundant (3.9 and 0.9% for fresh and dried samples, respectively). Beta-myrcene, alpha-terpineol and alpha-pinene were also extracted in quantifiable amounts in both oils. While the sesquiterpenes were absent in oil from the sun-dried peels, they were present in trace amounts in the fresh samples, with delta-cadinene representing the only constituent.