T1A may refer to:
Places edit
- Line T1a (Oslo Metro), Oslo, Norway
- T1A (postal code); see List of postal codes of Canada: T
Products edit
- BAe Hawk T1A, jet trainer
- Eurofighter Typhoon T1A, jet fighter; see Eurofighter Typhoon variants
Other uses edit
- iodothyronamine (T1a), a thyroid hormone