The study was to determine oil yield and phytochemical composition of Cymbopogon schoenanthus. Oil was extracted using 100 ml petroleum ether for each 45 g of pulverized grass. The extracts were evaluated qualitatively for phytochemical analysis and quantitative analysis to determine the chemical composition using Gas Chromatography-Mass Spectrometry (GC-MS). The result obtained for phytochemical screening revealed that alkaloids, balsams, cardiac glycosides, flavonoids, glycosides, saponin, saponin glycosides, steroids, tannins and volatile oils were present. Anthraquinone was not detected. While in each 45 g of pulverized grass sample 6.09 % of oil was obtained. Sixteen (16) Chemical constituents were detected in the oil of C. schoenanthus. Octane was the major constituent in the oil with a peak area (%) of 40.38. The compound present in least quantity was Dodecane 0.58 with peak area (%).
