Larchfield Academy (often called Larchfield School) was a preparatory school for boys in Helensburgh, Scotland.
It was founded in 1845. Among its famous pupils were Sir James Frazer and John Logie Baird. In the late 1920s and early 1930s Cecil Day-Lewis and W. H. Auden taught there briefly.
The school closed in 1977, and its building became part of the Lomond School which was formed from a merger with St. Brides Girls School, but was later sold to be converted into flats. The old building burnt down in a fire and now there is a new building where the old one was.