Karol Ilagan, Philippines, is a journalist and a journalism educator.

Since 2008, she has been reporting for and is now managing the editorial desk of the Philippine Center for Investigative Journalism (PCIJ), a Manila-based investigative nonprofit. Her investigations have revealed health hazards posed by a mining firm in an island-province in the Philippines and irregularities and conflicts of interests in government contracts, election spending reports, and wealth declarations of public officials.

From 2011 to 2014, she spearheaded the research and launch of MoneyPolitics.PCIJ.org, a data journalism project of PCIJ. She has also done periodic research on public procurement, fiscal transparency, and access to information in the Philippines.

Ilagan also teaches journalism at journalism schools in the Philippines.