Nils Westermark

{{Short description|Sailor and radiologist}}

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{{MedalSport|Men's Sailing}}

{{MedalSilver|1912 Stockholm | 8 metre class}}

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File:Nils Westermark.jpg

Nils Johan Hugo Westermark (September 9, 1892 – January 24, 1980) was a Swedish sailor who competed in the 1912 Summer Olympics. He later became a radiologist, and described the Westermark sign.{{Cite book|url=https://books.google.com/books?id=mNACisYwbZoC|title=Dorland's Illustrated Medical Dictionary|date=2011-06-09|publisher=Elsevier Health Sciences|isbn=978-1455709854|edition=32|pages=2080|language=en}}

He was a crew member of the Swedish boat Sans Atout, which won the silver medal in the 8 metre class.{{cite web|url=https://www.olympedia.org/athletes/64141 |title=Nils Westermark |work=Olympedia |access-date=30 May 2021}}