Loch Vennachar was an iron-hulled, three-masted clipper ship that was built in Scotland in 1875 and lost with all hands off the coast of South Australia in 1905. She spent her entire career with the Glasgow Shipping Company, trading between Britain and Australia. The company was familiarly called the "Loch Line", as all of its ships were named after Scottish lochs. The ship was named after Loch Venachar, in what was then Perthshire.

The Loch Line of Glasgow, Scotland, was a group of colonial clippers managed by Messrs William Aitken and James Lilburn. They plied between the United Kingdom and Australia from 1867 to 1911.