米利都（Μίλητος）是位于安纳托利亚西海岸线上的一座古希腊城邦，靠近米安得尔河口。它在赫梯文献中被称为Millawanda或者Milawata，在荷马的《伊利亚特》中也有出现。公元前1500年左右，一些从克里特岛来的移民定居于此，随后，这个城市就成为了爱奥尼亚十二城邦之一。在公元前6世纪它创建起了强大的海上力量，并创建了许多殖民地。在希波战争前它处于波斯统治下。米利都拥有一批著名的思想家，如泰勒斯、阿那克西曼德、阿那克西美尼等，世称米利都学派。

米利都曾先后被赫梯帝国、弗里吉亚人、吕底亚、马其顿帝国、罗马帝国、拜占庭帝国和鄂图曼帝国所统治。在鄂图曼帝国统治时期，米利都被用作一个与威尼斯进行贸易的港口，后来港口淤塞，城市被废弃。今日米利都的废墟距离海面数十公里，在卫星地图上 37°31.8'N 27°16.7'E 的位置，于土耳其艾登省内。

Miletus (/maɪˈliːtəs/; Ancient Greek: Μί̄λητος Mīlētos; Hittite transcription Millawanda or Milawata (exonyms); Latin:Miletus; Turkish:Milet) was an ancient Greek city on the western coast of Anatolia, near the mouth of the Maeander River in ancient Caria. Its ruins are located near the modern village of Balat in Aydın Province, Turkey. Before the Persian invasion in the middle of the 6th century BC, Miletus was considered the greatest and wealthiest of Greek cities. In other sources however it is mentioned that the city was much more modest up until the Peloponnesian War (431–404 BC), when, for example, the city state of Samos on the island of Samos opposite Miletus was considered a larger and more important city and harbor at the time. Miletus' greatest wealth and splendor was reached during the Hellenistic era (323–30 BC) and later Roman times.