Benmore Botanic Garden (formerly known as the Younger Botanic Garden) is a large botanical garden situated in Strath Eachaig at the foot of Beinn Mhòr, on the Cowal peninsula, in Argyll and Bute, Scotland. The gardens are on the west side of the A815 road from Dunoon, between the Holy Loch and Loch Eck, and include footbridges across the River Eachaig. It is one of the sites of Royal Botanic Garden Edinburgh.

Features include a Redwood Avenue of Giant Sequoias planted in 1863, large square walled gardens, a waterfall, a fernery, ponds and walks up the hillside to where you can look out across the Holy Loch. The garden is located within the Argyll Forest Park, which is itself within the Loch Lomond and The Trossachs National Park.