Milas is a municipality and district of Muğla Province, Turkey. Its area is 2,067 km², and its population is 147,416. The city commands a regio…Milas is a municipality and district of Muğla Province, Turkey. Its area is 2,067 km², and its population is 147,416. The city commands a region with an active economy and is very rich in history and ancient remains, the territory of Milas containing a remarkable twenty-seven archaeological sites of note. The city was the first capital of ancient Caria and of the Anatolian beylik of Menteşe in mediaeval times. The nearby Mausoleum of Hecatomnus is classified as a tentative UNESCO World Heritage Site.