Thailand Business Directory: THA is the ISO 3 alphabet country code of Thailand. Currency of Thailand is ฿, which has a short code of THB. Capital of Thailand is Bangkok. Thailand has the population of 69183173 and approximate area is 513120.00 square kilometers (or approx. 318852.768 square miles). Population density of Thailand is approx. 134/Km2 (or approx. 83.2676/mile2)