Kanchipuram district (Tamil: காஞ்சிபுரம் மாவட்டம்) is a district in the northeast of the state of Tamil Nadu in India. It is bounded in the west by Vellore District and Thiruvannamalai District, in the north by Tiruvallur District and Chennai District, in the south by Viluppuram District and in the east by the Bay of Bengal. It lies between 11° 00' to 12° 00' latitudes and 77° 28' to 78° 50' longitudes. The district has a total geographical area of 4,432 km² (1,711 sq mi) and coastline of 57 km (35 mi). The town of Kanchipuram is the district headquarters. The Chennai International Airport is located in Tirusulam in Kanchipuram district.