Noonans Mayfair, formerly Dix Noonan Webb, is an auction house based in London. It specialises in coins, medals, jewellery and paper money. Since being established, the firm has sold over 400,000 lots.
Noonans was established in 1990 as Buckland Dix and Wood. The name was changed to Dix Noonan Webb in 1996 and to its present name in 2022. It holds regular traditional auctions throughout the year.