Kyllinga nemoralis (J. R. Forst. & G. Forst.) Dandy ex Hutch & Dalziel is a perennial herb from the sedge family, Cyperaceae. The plant is commonly known as White Water Sedge. The present study were carried out to detect the presence of phytochemicals in the methanol extracts, its quantification and essential oil profiling using GC-MS. Preliminary phytochemical analysis of K. nemoralis revealed the presence of Carbohydrates, Phenols, Flavonoids, Flavones, Tannins, Saponins, Alkaloids, Steroids, Terpenoids, Coumarins, Quinones, Lignins and Fats and Oilsin all the plant parts. Quantitative phytochemical analysis resulted in the detection of highest percentage of phytocompounds in the plant extract. Phenols were found to be high in rhizome (37.08µg/mg). Polyphenol content (22.97µg/mg) in the rhizome (19.97µg/mg) and whole plant was relatively higher than in the aerial part (13.13µg/mg). Total tannin (223.75µg/mg) and flavonoid (156µg/mg) content was high in whole plant. Terpenoid content was observed to be high in aerial portion (80.61µg/mg). GC-MS analysis of the essential oil of rhizome of K. nemoralis revealed the presence of Terpenoid compounds in high amount [a’-elemene (63.15%)].Thus it is evident that the phytocompounds from this plant could be possibly isolated and utilized effectively as sources of phytochemicals.