Individuals, families, and communities initially come into contact with the national health system through primary health care, which brings health care as close as possible to where people live and work. Well-trained health practitioners must provide "scientifically sound and socially acceptable procedures made universally accessible."The major goal of this article is to calculate the influence area of primary health centers in the Nasik district of tribal tehsils. Jackson’s (2009) approach has been used to calculate the Influence Area of Primary Health Centres. The development of a primary health center necessitates the presence of 30000 non-tribal residents and 20000 tribal residents. The number of Primary Health Centres necessary in the Nasik district of tribal tehsils have75, but only 43 have been created, and more than 32 are needed. The impact area of Primary Health Centres in tribal tehsils of Nashik district is 213.86 square kilometers. The effect of the area of Primary Health Centres in Nashik district is 18.24 villages, according to the population, the influence area of Primary Health Centres in tribal tahsils of Nashik district is 32528.33.