India's coastlining measures:

• The total coastline of India comprises the mainland coastline and that of the Indian islands. The mainland coastline is 5422.6 km long and the coastline of the islands adds up to 1197 km.
• The nine states that constitute the mainland coastline are - Gujarat, Maharashtra, Goa, Karnataka, Kerala, Tamil Nadu, Andhra Pradesh, Odisha, and West Bengal. Also, two union territories, Daman and Diu and Puducherry, are a part of the mainland coastline.

Additional Information

• The longest coastline (1600 km ) of India lies in the Kathiawar region of Gujarat.
• Andhra Pradesh comes next to Gujarat in terms of the length of the coastline. It has a 974 km long coastline.
• The third longest coastline lies in Tamil Nadu.
• The coastline of Maharashtra is 720 km long and is known as the Konkan coast.
• The coastline of Kerala is 580 km long (fifth longest after Tamil Nadu) and is known as the Malabar coast.
• The coastline of Odisha is 485 km long and the coastal region is known as Utkal Plain. The largest lake in the country, Chilka lake is located in this region.
• Kanara is the coastal region of Karnataka and is 320 km long. Uttara Kannada, Udupi, and Dakshina districts of Karnataka and situated in this region.
• The smallest state of the country Goa has a 180 km long coastline.
• The coastal plains of West Benagal and the coastline is 157 km long.