Rizalina "Lina" Parabuac Ilagan (born June 19, 1954—disappeared on July 31, 1977) was an anti-martial law activist who belonged to a network of community organizations in the Southern Tagalog region in the Philippines.

[3] Ilagan's name is inscribed on the Bantayog ng mga Bayani Wall of Remembrance, which honors martyrs and heroes of martial law.

She became an activist and joined the local chapter of the militant youth group Kabataang Makabayan (KM) in her senior year in high school.

She became the Southern Tagalog coordinator of KM's Panday Sining theater organization, which staged plays depicting the problems of Philippine society.

[1][10] They were to meet fellow community organizers Gerardo "Gerry" Faustino, Modesto Sison, Ramon Jasul, Emmanuel Salvacruz, Salvador Panganiban, Virgilio Silva, and Erwin de la Torre, all of whom were also abducted.

[3][11] Ilagan is recognized as a martyr and hero of martial law and her name has been inscribed on the Bantayog ng mga Bayani Wall of Remembrance.