The largest and most economically and politically important island in the Philippines and one of
the three island groups in the country, with Visayas and Mindanao being the other two. Luzon as
an island group includes the island of Luzon itself, plus the Batanes and Babuyan groups of islands
to the north, and the main and outlying islands of Catanduanes, Marinduque, Masbate, Romblon, and Mindoro
in the south.