James Lackington (31 August 1746, in Wellington, Somerset – 22 November 1815, in Budleigh Salterton, Devon) was a bookseller who is credited with revolutionizing the British book trade. He is best known for refusing credit at his London bookshop which allowed him to reduce the price of books throughout his store. He built the largest bookstore in the United Kingdom, with an inventory of over 500,000 volumes.