Abstract: A total of 1255 pitcher plants belonging to two species were recorded from 11 plots set between 2610 m to 2970 m altitude on Mount Kinabalu, each with an area of 0.01 hectare. Of these plants, 1180 (94%) belonged to Nepenthes villosa, followed by N. kinabaluensis contained 75 (6%) plants. The density of N. villosa and N. kinabaluensis ranged from 0 to 260 and 0 to 65 plants respectively. Nepenthes villosa was recorded absent in P5, whereas N. kinabaluensis was recorded in P2, P3 and P11. Differences in density of both species between the study plots is influenced by combination of factors, which include topography, soil, habitat, different light intensities reaching the forest floor and water deficient due to exposure to wind and light intensities at higher altitudes. The Id values were greater than 1 for both species in all plots showing contagious dispersion pattern. Size class distribution and population structure varied for both species between plots. Generally there were more seedlings and juveniles than mature plants of both species at different elevations indicating regenerating populations. In mature plants there were more male than female plants in both species.