Mactan is a densely populated island located a few kilometers (~1 mile) east of Cebu Island in the Philippines. The island is part of Cebu province and it is divided into the city of Lapu-Lapu and the municipality of Cordova.
The island is separated from Cebu by the Mactan Channel which is presently crossed by three bridges: the Cebu–Cordova Link Expressway (CCLEX), the Mactan–Mandaue Bridge, and the Marcelo Fernan Bridge. The island covers some 65 square kilometres (25 sq mi) and has a population of 526,620 as of 2024, making it the nation's most densely populated island. Along with Olango Island Group, the isles are administered by a city and a municipality covering 75.25 square kilometres (29.05 sq mi).