Field experiments were conducted at Central Potato Research Station, Muthorai, the Nilgiris, Tamil Nadu forthree years with seven potato cultivars under four levels of phosphorus application to evaluate their phosphorususe efficiency. Cultivars Kufri Neelima and Kufri Swarna were found more P efficient because of their higherrelative biomass production, tuber yield efficiency index, harvest index, agronomic use efficiency (AUE) and Puptake efficiency. These two cultivars produced higher tuber yields under no P and at Pmax of standard variety. The cultivars Kufri Girdhari, Kufri Jyoti and Kufri Himalini proved P responsive as they responded well to itsapplication and produced very low yields under no P application. Higher root biomass in these two efficientcultivars could be the reason behind their higher P use efficiency in comparison to other cultivars. The two Pefficient potato cultivars also happened to be resistant to potato cyst nematode, which are very common andserious problem in Nilgiris. The mechanism to have resistance against PCN, whose cysts emerge only in thepresence of root exudates of susceptible potato cultivars, could also have benefitted those cultivars to showmore efficiency in native P utilization. Further investigations are required to find out the exact mechanism of Pefficiency in these two PCN resistant cultivars.