NST may refer to:
Health
- Nonstress test, a screening test used in pregnancy test
Media
- Niigata Sogo Television, a television company in Niigata Prefecture, Japan
- New Straits Times, an English-language newspaper published in Malaysia
- New Sabah Times, a newspaper in Sabah, Malaysia
- Real Scary Television (), a television channel in Russia
Military
- Naval Security Team, a deployable Royal Canadian Navy (RCN) force protection unit tasked to augment fleet existing force protection measures in expeditionary or domestic environments.
Science and engineering
- National Research Council of Science and Technology, a research group under the Ministry of Science and ICT
- National Standard Thread, a thread form used on fire hose couplings in the USA
- Natural Sciences Tripos, a courses system of the University of Cambridge
- Neon-sign transformer, a high voltage transformer
- Neural Style Transfer, a non-realistic rendering technology
Time zones
- National Standard Time, Taiwan
- Nepal Standard Time
- Newfoundland Standard Time
Transportation
- Nakhon Si Thammarat Airport, Thailand, IATA code
Other uses
- NST (company), UK travel group
- Network Security Toolkit, a live Linux CD
- New standard tuning for guitar
- Nintendo Software Technology, a video game company
- Niue Soccer Tournament, top association football league in Niue
- Non-sellable token, a type of scam seen in cryptocurrency
- State of East Sumatra (Negara Sumatera Timur), a former federal state