Grantham Sound

{{Short description|Bay in the Falkland Islands}}

{{Use dmy dates|date=April 2022}}

Grantham Sound ({{Langx|es|Bahia de Ruiz Puente}}) is a bay on East Falkland, Falkland Islands, which opens out into the Falkland Sound.{{Cite web |title=Lord West recalls sinking of HMS Ardent 40 years after the Falklands War |url=https://au.news.yahoo.com/lord-west-recalls-sinking-hms-230159783.html |access-date=2022-06-17 |website=au.news.yahoo.com |language=en-AU}} At its landward end, it narrows and becomes Brenton Loch (sometimes included as a part of it).{{Cite book |last=Office |first=Great Britain Colonial |url=https://books.google.com/books?id=UJAE1xtPPfgC |title=Falkland Islands: Return to an Address of the Honourable the House of Commons, Dated 31 March 1843, for Copies Or Extracts of Any Correspondence Relative to the Falkland Islands, Since the Last Papers Laid Before the House Upon the 27th Day of August 1841 |date=1843 |publisher=House of Commons |pages=19 |language=en}} Mount Usborne overlooks it.

Along with San Carlos Water, it is one of the proposed sites for the East Falkland terminal for the anticipated ferry to West Falkland.