NTU may stand for:
- National Taxpayers Union, a nonprofit organization in the United States
- National Team Unity, a political party in Trinidad and Tobago
- National Television Company of Ukraine, a Ukrainian television broadcaster
- Nephelometric Turbidity Unit, a measure of the cloudiness of a liquid
- Nevada–Texas–Utah Retort, a shale oil extraction technology
- New Threat Upgrade, a US Navy anti-air warfare ships system upgrade
- NTU method uses the Number of Transfer Units to calculate the efficiency of a heat exchanger
Read more about NTU: Education