Davis Duckart (Ducart) was an architect and engineer in the mid-18th century, primarily in Ireland.
From 1765 onwards Ducart designed several country houses, including Lota, county Cork (1765), Kilshannig, county Cork (around 1765–1766), Brockley Park, Queen's county (1768), Crosshaven House, county Cork (1769), and Castletown Cox, county Kilkenny (around 1770). Ducart re-designed the garden at Lissan, Cookstown, Northern Ireland.
Ducart's style was eclectic, drawing both on continental baroque and on English Palladian pattern books and included unorthodox detailing. The exact date of his death is uncertain, due to legal complications. It is thought that Ducart died between 30 November 1780, when he wrote his will, and 29 March 1786, when the will was proved.