Nellore district
Located in the Coastal Andhra region , the district is bordered by the Bay of Bengal to the east , Kadapa district to the west , Prakasam district to the north , and Chittoor district and Thiruvallur district of Tamil Nadu to the south . 
<triplet> Kadapa district <subj> Prakasam district <obj> shares border with <subj> Chittoor district <obj> shares border with <triplet> Prakasam district <subj> Kadapa district <obj> shares border with <triplet> Chittoor district <subj> Kadapa district <obj> shares border with <triplet> Thiruvallur district <subj> Tamil Nadu <obj> located in the administrative territorial entity <triplet> Tamil Nadu <subj> Thiruvallur district <obj> contains administrative territorial entity