India's Coastline Length Updated to 11,098.81 km After Methodology Revision.
National
In April 2025, as per the Survey of India (SoI) data, India’s coastline length was officially updated to 11,098.81 kilometers (km), marking an increase of 3,582.21 km or nearly 50% from the earlier figure of 7,516.60 km recorded since the 1970s.
- This revision is the result of a multi-year scientific assessment led by the Dehradun (Uttarakhand)-based National Hydrographic Organisation (NHO) in coordination with SoI.
- As per the revised measurements, Gujarat holds the longest coastline among states, while Goa has the shortest.
- Among union territories (UTs), the Andaman & Nicobar (A&N) Islands have the longest coastline, whereas Puducherry has the shortest.
Main Point :- (i) In April 2025, India’s coastline length was officially revised to 11,098.81 km, up by 3,582.21 km from the earlier figure of 7,516.60 km used since the 1970s. This revision was led by the National Hydrographic Organisation (NHO) and Survey of India (SoI) using modern scientific methods.
(ii) The older data was based on outdated methods with a smaller scale (1:4,500,000), while the updated data used a more accurate 1:250,000 scale and GIS technology. The new figure also includes 1,298 offshore islands/islets, which were earlier missed.
(iii) The revised length was accepted in January 2024 during a meeting at the National Security Council Secretariat (NSCS), New Delhi, with all coastal States/UTs. Gujarat now has the longest coastline among states, while Goa has the shortest; among UTs, Andaman & Nicobar Islands lead, and Puducherry is the shortest.
About Survey of India (Sol)
Surveyor General of India : Hitesh Kumar S. Makwana
Headquarters : Dehradun
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