IDB can mean:

• involuntary deboarding, passenger being ordered to leave an overbooked airline flight
• Industrial revenue bonds (formerly called Industrial Development Revenue Bonds) are bonds issued to construct facilities or purchase equipment which is then leased to a corporation
• Inter-American Development Bank, also known as IADB
• Islamic Development Bank, a multilateral development financing institution also known as ISDB
• Israel Discount Bank, an Israeli bank with branches in the United States as well as in Israel
• IDB Communications Group, Inc., a constituent of MCI Inc.
• Illegal Diamond Buying, the term used at the turn of the 19th-20th century for diamond trading outside the De Beers cartel
• IndexedDB or Indexed Database API, a low-level API for client-side storage of significant amounts of structured data, including files/blobs
• Industrial Development Bank, now the Business Development Bank of Canada
• Intermediate Debug File, a Visual Studio file type
• Intel debugger, a proprietary debugger
• Intelligent drum and bass, a subgenre of drum and bass music
• Internal drainage board, a type of English and Welsh water level management authority
• Interface Descriptor Block, a Cisco IOS internal data structure that contains information on network data
• Irish Dairy Board, the former name of a co-operative enterprise in Ireland, now known as Ornua
• Industrial Development Board, boards with powers to raise levies from specific industrial sectors in the United Kingdom for co-ordinated action
• Industrial Development Bureau, an agency of the Ministry of Economic Affairs of the Republic of China