This study applied a high-pressure and high-temperature system using water as solvent, to extract the essential oil from kaffir lime peel. In this work, it aimed to determine the effect of temperature and gas such as N2 and CO2, on the yield of essential oils extracted from kaffir lime peel and volatile compounds in the extracted essential oils.  The essential oils from kaffir lime peel were extracted using 300 g of sample combined with 300 ml of distilled water at a pressure of 5 bar for gas N2 and 3.4 bar for gas CO2, and applied temperatures of 100 oC and 110 oC for both gases. The results in this work revealed that temperature and type of gases using in the pressurization affected the extraction of essential oil in terms of both yield and volatile compounds in the extracted oil. At extraction temperature of 110 oC and gas CO2 provided a yield of essential oil of 1.33 % which is higher than the yield of essential oil using gas N2 (0.86 %). The extraction parameter including temperature and type of pressurized gases, affected the volatile compounds in the essential oil in terms of the numbers of compounds and the level of concentration. Both essential oil of kaffir lime peel obtained from using N2 and CO2 gases contained D-limonene as the major volatile compound. In addition, -Terpineol (13.41 %), Isoborneol (12.41 %), and Terpinen-4-Ol (11.77 %) were found as a majority compound in the essential oil of kaffir lime peel obtained from using N2 gas at temperature 100 oC. Whereas, using CO2 gas at the same temperature, -Pinene (14.44 %) was the majority compound in the essential oil. Thus, the use of a high temperature and high-pressure water system for EO extraction provides a high yield of essential oils and recovery of valuable compounds from kaffir lime peel. Moreover, it is regarded as one of the potential alternatives for improving the extraction efficiency of kaffir lime peel to the growing demand for end-use product manufacturing.