**Executive Summary**
This document reports the reassessment of India's coastline length by the National Hydrographic Office (NHO) in coordination with the Survey of India (SoI). The revised length is 11,098.81 km, updated from the previous 7516.6 km. The revised coastline was promulgated by the Ministry of Ports Shipping and Waterways (MoPSW) circular dated 29th April 2025.
**Key Points / Main Content**
* **Coastline Reassessment:**
* India's coastline length was reassessed to 11,098.81 km.
* The reassessment was conducted by NHO in coordination with SoI.
* Modern GIS software and high-resolution High-Water Line (HWL) data were used.
* The Coastal Protection and Development Advisory Committee (CPDAC) accepted the revised length.
* The revised coastline was promulgated by MoPSW on April 29th, 2025.
* **State-wise Coastline Length Changes:**
* The document contains a table showing the old and revised coastline lengths for each coastal State/UT.
* Gujarat has the longest coastline (2,340.62 km).
* Andhra Pradesh's coastline length is now the third-longest among the states.
* **Impact of the Revision:**
* The updated coastline supports better planning for developmental activities and disaster-risk assessments.
* It improves management of territorial waters, EEZ boundaries, and enhances security.
* The revised coastline length does not affect areas covered under the CRZ regulations.
* CRZ boundaries are determined solely on the basis of the actual High Tide Line (HTL) demarcated by NCSCM.
**Impact Analysis**
**Coastal States/UTs**
* **Impact:** The revised coastline lengths may influence development planning, resource allocation, and disaster preparedness strategies within each State/UT.
* **Action Required:** Review and update coastal zone management plans, infrastructure projects, and disaster management plans based on the revised coastline data.
**National Security Council Secretariat (NSCS)**
* **Impact:** The updated coastline measurements are based on their latest terms of references.
* **Action Required:** Incorporate updated measurements into strategic planning and security assessments related to India's maritime boundaries.
**Ministry of Ports, Shipping and Waterways (MoPSW)**
* **Impact:** MoPSW has promulgated the revised coastline length.
* **Action Required:** Implement and enforce policies and regulations based on the updated coastline data, and use the updated data for planning and development of port infrastructure.
Key Entities Referenced
National Hydrographic Office (NHO): Responsible for reassessing India's coastline length in coordination with Survey of India.
Ministry of Ports Shipping and Waterways (MoPSW): Promulgated the revised coastline length of India via circular.
Survey of India (SoI): Coordinated with NHO to reassess India's coastline, provided high-resolution data.
Coastal States/UTs: Their concurrence was obtained for the revised coastline length.
India: The coastline of the country is the subject of the reassessment.
Ministry of Earth Sciences
PARLIAMENT QUESTION: Coastline of the
Country
प्रव तथ: 04 DEC 2025 5:08PM by PIB Delhi
The length of India’s coastline of 7516.6 km has been re-assessed to 11098.81 km by National
Hydrographic Office (NHO) in coordination with Survey of India (SoI) as per the latest terms of
references provided by National Security Council Secretariat (NSCS). The updated measurements were
carried out using modern GIS software and high-resolution data of High-Water Line (HWL) based on
latest surveys thereby capturing more intricate details. Coastal Protection and Development Advisory
Committee (CPDAC) accepted the revised coastline length of India after obtaining concurrence from all
coastal States/UTs. Based on the report published by Survey of India, the revised length of coastline was
promulgated by Ministry of Ports Shipping and Waterways (MoPSW) circular dated 29th April 2025.
Accordingly, the state wise length of the coastline of India has changed and the details have been given in
the table below. In view of the revision of the length of coastline across the country, the length of Andhra
Pradesh’s coastline has become third in position.
State / UT Old Coastline (km) Revised Coastline (km)
Gujarat 1,214.70 2,340.62
Tamil Nadu 906.9 1,068.69
Andhra Pradesh 973.7 1,053.07
Maharashtra 652.6 877.97
West Bengal 157.5 721.02
Kerala 569.7 600.15
Odisha 476.4 574.71
Karnataka 280 343.3Goa 160.50 193.95
Daman & Diu 54.38
Andaman & Nicobar Islands 1,962.00 3,083.50
Lakshadweep 132 144.8
Puducherry 30.60 42.65
Total (India) 7,516.6 11,098.81
The updated coastline supports better planning for developmental activities such as ports, infrastructure,
tourism zones, and disaster-risk assessments, enabling governments to prepare more effectively for
cyclones, erosion, flooding etc. Improved baseline data supports India’s maritime in improved
management of territorial waters and EEZ boundaries, and enhances the security.
The revised coastline length of 11,098.81 km does not affect areas covered under the CRZ regulations, as
CRZ boundaries are determined solely on the basis of the actual High Tide Line (HTL) demarcated by the
National Centre for Sustainable Coastal Management (NCSCM), Chennai, under the Ministry of
Environment, Forest and Climate Change (MoEF & CC). The HTL mapping was carried out using very
high-resolution digital aerial photographs from the Survey of India, captured at a much finer scale and
subsequently validated through detailed ground verification. Therefore, the updated coastline
measurement has no bearing on CRZ jurisdiction or its regulatory framework.
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