David Barclay
David Barclay may refer to:
- Col. David Barclay (Quaker), 1st Laird of Urie and father of Robert Barclay, the Quaker apologist
- David Barclay of Cheapside, Scottish Quaker merchant, grandson of the 1st Laird of Urie, father of David Barclay of Youngsbury
- David Barclay of Youngsbury, English Quaker merchant and banker, grandson of Robert Barclay
- David Barclay (MP), English Whig politician
- David Barclay (congressman), member of the U.S. House of Representatives
- Sir David Barclay, British businessmen
- David E. Barclay, American historian and author
- David Barclay (puppeteer), British puppeteer
- Dave O'Brien (actor), who used the pseudonym David Barclay for his film writing and directing work