Sir David and Sir Frederick Barclay (born 1934) are British businessmen who co-own of the newspaper The Scotsman. They are twin brothers, and are frequently described as being reclusive.

Since 1993, they have owned the island of Brecqhou, which is one of the Channel Islands, located just west of Sark. Since the purchase the Barclays have been in several legal disputes with the government of Sark, and have expressed a desire to make Brecqhou politically independent from Sark.

In 2003, they were listed in joint 34th place in the Sunday Times Rich List, which estimated their combined wealth as at least £650,000,000. It stated property, media, and hotels as the main sources of their riches.