Exchange Alley or Change Alley is a narrow alleyway connecting shops and coffeehouses in an old neighbourhood of the City of London in England, bounded by Lombard Street, Cornhill and Birchin Lane. It served as a convenient shortcut from the Royal Exchange to the Post Office. The shops included ship chandlers, makers of instruments for navigation such as telescopes, and goldsmiths from Lombardy.

The coffee houses of Exchange Alley, especially Jonathan's and Garraway's, became an early venue for the lively trading of stocks and commodities. These activities were the progenitor of the London Stock Exchange. Similarly, Edward Lloyd's coffee house, at 16, Lombard Street but originally on Tower Street, was the forerunner of Lloyd's of London, Lloyd's Register and Lloyd's List.