- DTN stands for Direction Technique Nationale (French: National Technical Direction)
- DTN stands for Dirichlet-to-Neumann (electric fields)
- DTN stands for Data Transmission Network
- DTN stands for Delay-Tolerant Networking
- DTN stands for Développement Tremblant Nord (French real estate company)
- DTN stands for Dépistage des Troubles Nutritionnels (French: Screening of Nutritional Disorders)
- DTN stands for Disruption Tolerant Network
- DTN stands for Dauphin Touch Network Pvt. Ltd. (India)
- DTN stands for Diffusion Technique du Nord (French fireplace accessory company)
- DTN stands for Defense-Technology News (blog)
- DTN stands for Digital Telephone Network
- DTN stands for Duplex, Tray, Network (HP designator on LaserJet printers)
- DTN stands for Data Transfer Network
- DTN stands for Daystar Television Network
- DTN stands for Defence Telegraph Network (UK)
- DTN stands for Defence Teleprinter Network (UK military)
- DTN stands for Defense Telecommunications Network
- DTN stands for Dysphagia Trained Nurse (UK)
- DTN stands for Depth to NAPL (Non-Aqueous Phase Liquid)
DTN