LTA may refer to
- Lower Than Atlantis, British rock band
- Land Transport Authority in Singapore
- Land Trust Alliance in the United States
- Lawn Tennis Association in the United Kingdom
- Lieutenant
- Lighter than air
- Lipoteichoic acid
- Lost time accident
- Lymphotoxin alpha
- Lambda Theta Alpha, Latin Sorority, Incorporated
- Línea Turística Aereotuy, a Venezuelan airline
- Linde type A, a zeolite mineral