LTA

LTA may refer to:


 * Business Administration Union, a trade union in Finland
 * Land Transport Authority, a statutory board under the Ministry of Transport of the Singapore Government in Singapore
 * Lawn Tennis Association in the United Kingdom
 * Learning Through Art, an educational program of the Guggenheim Museum in New York
 * Lieutenant in Singapore Civil Defence
 * Lighter than air, sometimes used in ballooning as in an "LTA pilot license"
 * Lipoteichoic acid
 * Lymphotoxin alpha
 * Lambda Theta Alpha, Latin Sorority, Incorporated
 * Linde type A molecular sieve, an aluminosilicate drying agent
 * Línea Turística Aereotuy, a Venezuelan airline
 * Legs, Trunk, Arms, now PR3, an adaptive rowing classification
 * Long-term average, a type of moving average
 * Light transmission aggregometry, a method for measuring the aggregation of platelets in blood
 * Long Term Agreement, a.k.a. Frame contract Framework agreement
 * Louis Troy Austin