| Blue Mountains Botanic Garden | |
| Map: | Australia New South Wales |
| Relief: | 1 |
| Map Width: | 400 |
| Nearest City: | Sydney |
| Coordinates: | -33.5391°N 150.4226°W |
| Area: | 28ha |
| Operator: | The Botanic Gardens Trust trading the Botanic Gardens & Centennial Parklands |
| Visitation Num: | 158,512 |
| Visitation Year: | 2016 |
| Visitation Ref: | [1] |
| Status: | Open all year |
The Blue Mountains Botanic Garden, originally known as the Mount Tomah Botanical Garden, is a 28adj=onNaNadj=on public botanic garden located approximately west of the Sydney central business district at in the Blue Mountains, in New South Wales, Australia. The garden is heritage-listed[2] and is located on the boundary of the UNESCO World Heritage Site Greater Blue Mountains Area and can be accessed via the Bells Line of Road.
The garden was established in 1972. It includes an additional 128ha of land dedicated to conservation. The garden is, and it specializes in cool-climate plants that would not grow well in Sydney's warmer conditions. The gardens are managed by the Botanic Gardens Trust trading the Botanic Gardens and Centennial Parklands, that also has responsibility for the Royal Botanic Gardens, Sydney and the Australian Botanic Garden at . The Trust is a division of the Department of Environment and Planning.
The land was originally granted to Susannah Bowen, the mother of George M. C. Bowen, in 1830. She had arrived in the colony in 1828.[2]