KKT may stand for:

• Karush–Kuhn–Tucker conditions in mathematical programming
• Kathleen Kennedy Townsend, former lieutenant governor of Maryland
• Klaipėda city passenger transport (Klaipėdos keleivinis transportas), the public transport authority in Klaipėda, Lithuania

• Multi-Modal Transport System (Hyderabad)
• Multi-mode fibre
• Multi-mode optical fibre
• Multi-modular arithmetic
• Multimodule
• Multi-murderer
• Multi-narrative
• Multinarrative
• Multinational Division (Central)
• Multi-National Division (North) (Bosnia)
• Multinational Emulation
• Multinational Medical Coordination Centre
• Multinational organization
• Multinational tax haven
• Multinellus grass-veneer
• Multinomial Naive Bayes
• Multinomial response models and endogeneity
• Multinoulli distribution
• Multinucleate giant cell
• Multi-objective linear programming
• Multi-omics
• Multiomics
• Multi organ failure
• Multi Organ Retrieval and Exchange
• Multiotp