Which city was the capital of the Postclassic Maya League of Mayapan? The answer is Mayapan.
Mayapan was the principal political and cultural capital of northern Yucatán during the Late Postclassic period. The city grew into the centre of a powerful confederation traditionally known as the League of Mayapan, whose influence extended across much of the peninsula and into wider trade networks.
The walled city covered about 4.2 square kilometres and contained more than 4,000 structures, including temples, shrines, palaces, residences, and administrative buildings. Population estimates commonly range from 15,000 to 17,000 people. Its best-known temple, the Castillo of Kukulcán, echoes the architectural form of the famous pyramid at Chichén Itzá.
Mayapan's political dominance lasted roughly from the 1220s until the 1440s. Historical accounts describe rival noble families, especially the Cocom and Xiu lineages, and later conflict that fractured the confederation. Archaeological evidence points to violence, burning, and abandonment around the 15th century. It is easy to confuse Mayapan with Chichén Itzá or Uxmal, which were also major Yucatecan powers, but Mayapan gave the league its name and served as its central capital.