DPI may stand for
- Dots per inch, a measure of printing resolution
- Dhaka Polytechnic Institute, an educational institution of Bangladesh
- Death Pact International, one of the first open source musical concept projects
- Deep packet inspection, a form of computer network packet filtering
- New South Wales Department of Primary Industries (NSW DPI), an Australian governmental unit
- Department of Public Information, related to U.N.
- Digital Program Insertion
- Disabled Peoples' International, an international non-governmental organization
- Disposable personal income
- Drawbar Pull Index, a measure of how much force a vehicle (agricultural tractor) can pull.
- Dry powder inhaler, a drug delivery device
- Dual Polarisation Interferometry
- Dye penetrant inspection, a Nondestructive testing method