"¿Por Qué Te Tengo Que Olvidar?" (English: "Why Do I Have to Forget You?") is a song written by Luis Ángel, Edwin Apolinaris and Tommy Villarini, performed by Puerto Rican-American singer-songwriter José Feliciano. The song was released as the lead single from the album Niña (1990). The track became Feliciano's first number-one single in the Billboard Top Latin Songs chart. The parent album, dedicated to her then newborn child, became commercially successful, peaking at number three in the Latin Pop Albums chart in the United States. Feliciano recorded the song after the end of a period in which he stayed away from the stage to devote time to his family and fulfilling his dream of hosting a radio program. The singer received a Grammy Award for Best Latin Pop Performance for the song, his sixth Grammy Award overall.

The song debuted in the Billboard Top Latin Songs chart (formerly Hot Latin Tracks) at number 23 in the week of July 21, 1990, climbing to the top ten four weeks later, peaking at number-one on September 15, 1990, holding this position for two weeks, replacing "Tengo Todo Excepto a Tí" by Mexican singer Luis Miguel, and being succeeded at the top by José José's "Amnesia". In 2000, a tribute to José Feliciano's work was released, entitled Guitarra Mia, with the participation of several performers including Marc Anthony, Son by Four, Gilberto Santa Rosa, Gisselle, Lucecita Benitez, Nydia Caro, Danny Rivera, Manny Manuel, Prodigio, and Ednita Nazario. This album includes a cover version of "¿Por Qué Te Tengo Que Olvidar?" by Millie Corretjer.Grupo Atrapado, Germán Montero, Vinicio Quezada, Johnny Ray, Eddie Santiago and Sergio Vargas have also recorded the song.