Lennart Lindroos

{{short description|Finnish swimmer}}

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| birth_date = {{Birth date|1886|12|2}}

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| death_date = {{Death date and age|1921|7|26|1886|12|2}}

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Karl Gustaf Lennart Lindroos (December 2, 1886 – July 26, 1921) was a Finnish breaststroke swimmer who competed in the 1912 Summer Olympics. He was born in Helsinki. In 1912 he was eliminated in the semi-finals of the 200 metre breaststroke event as well as in the semi-finals of the 400 metre breaststroke competition.{{cite web|url=https://www.olympedia.org/athletes/46658 |title=Lennart Lindroos |work=Olympedia |access-date=7 June 2021}}