David Lennox (1788 – 12 November 1873) was a Scottish-Australian bridge builder and master stonemason born in Ayr, Scotland.

[3] Prior to this time, the young colony of New South Wales had no skilled stonemasons, and so it was almost fate that a chance meeting with the Surveyor-General, Major Thomas Mitchell should result in Lennox—by now a Master Stonemason with twenty years' experience—becoming, provisionally, Sub-Inspector of Bridges and later Superintendent of Bridges.

Lennox moved to Melbourne in 1844, to take up a position responsible for bridges in the Port Phillip district.

Lennox retired in November 1853 and returned to New South Wales two years later where he lived in Parramatta.

[4] As well as bridges, Lennox was also in charge of roads, wharves and ferries in the Port Phillip district.