Dadra and Nagar Haveli, district, Dadra and Nagar Haveli and Daman and Diu union territory, west-central India, located in the western part of the country and situated between the states of Gujarat to the north and Maharashtra to the south. It lies some 15 miles (24 km) from the Arabian Sea and about 80 miles (130 km) north of Mumbai (Bombay). The territory consists of two sections—Dadra and Nagar Haveli—which together embrace roughly 70 villages. Its administrative headquarters is located in Silvassa. Area 190 square miles (491 square km). Pop. (2011) 342,853.