Sir David Cuninghame, 3rd Baronet ( â 4 July 1770) was a Scottish landowner and aristocrat.
Cuninghame was born in Scotland in . He was the only son and heir of Sir Alexander Cuninghame, 2nd Baronet (died 1730) and the former Margaret Boyle. His sister, Jean Cuninghame, married William Newall (a son of Adam Newall). His father was only a minor when his father, the 1st Baronet, died, and "was, ill-advisedly, served heir general to his father" and "heir special in the Barony of Robertland. By this service not only his estate but what of his wife was given up to his father's creditors, and he had to subsist 'by the effects of his industry.'"
His paternal grandparents were Sir Alexander Cuninghame, 1st Baronet, and Mary Stewart (sister of Sir Archibald Stewart, 1st Baronet, of Blackhall). Through his paternal line, he was separately a descendant of the 4th Earl of Glencairn through the Earl's second son, Hon. Andrew Cunningham, and the 7th Earl of Glencairn, through the Earl's daughter, Lady Mary Cuninghame. His maternal grandparents were John Boyle of Kelburn, MP for Bute, and Marion Steuart (the daughter of Sir Walter Steuart of Allanton). His maternal uncle was David Boyle, 1st Earl of Glasgow.
Upon the death of his father in 1730, he succeeded as the 3rd Baronet Cuninghame of Corsehill in the Baronetage of Nova Scotia.
Sir David married Penelope Montgomery (d. ), daughter of Margaret Montgomery (a daughter of Alexander Montgomery of Kirktonholm, Lanarkshire) and Alexander Montgomery of Assloss, Ayrshire. Penelope was the niece and heiress of Sir Walter Montgomery, Baronet, of Kirktonholm (descended from the Montgomeries of Skelmorly). Together, they were the parents of:
Sir David died at Corsehill in July 1770. As his eldest son predeceased him by about six months, he was succeeded in his title by grandson, Walter Montgomery-Cuninghame.
Through his son Alexander, he was a grandfather of Sir Walter Montgomery-Cuninghame, 4th Baronet, Sir David Montgomery-Cuninghame, 5th Baronet and Sir James Montgomery-Cuninghame, 6th Baronet.