What is the largest provincial capital in Luzon in terms of land area?

Ilagan City, Isabela

*##*Good one, the Ilagan City is right! Ilagan City in Isabela province became the newest Philippine city in December 2012. It is the capital city of the province and is the largest city (land area) in Luzon. It is one of the largest provincial capitals in the country in terms of land area.*##*Sorry, but Ilagan City is correct! :( Ilagan City in Isabela province became the newest Philippine city in December 2012. It is the capital city of the province and is the largest city (land area) in Luzon. It is one of the largest provincial capitals in the country in terms of land area.