Palau Business Directory: PLW is the ISO 3 alphabet country code of Palau. Currency of Palau is $, which has a short code of USD. Capital of Palau is Melekeok - Palau State Capital. Palau has the population of 21964 and approximate area is 459.00 square kilometers (or approx. 285.2226 square miles). Population density of Palau is approx. 47/Km2 (or approx. 29.2058/mile2)