"El Chico del Apartamento 512" ("The Boy in Apartment 512") is a song by Mexican American Tejano pop singer Selena. "El Chico del Apartamento 512" was the sixth promotional single released from Amor Prohibido (1994). The song was written and produced by Selena's brother and music producer, A.B. Quintanilla, lead keyboardist of the group, Ricky Vela, Joshua Munoz, Bebu Silvetti, Steven Torres and James Moore. It was released in the United States for Tejano and Contemporary Latin radio stations and was released as a promotional single a day before Selena was murdered on March 31, 1995. Selena promoted the song during her Amor Prohibido Tour, the song was included in every venue. Her final performance was on March 14, 1995 during her concert Calle Ocho Festival in Miami, Florida, which attracted over 100,000 fans.

In an interview with La Nación, Selena said that she recorded the song because she believed her fans would appreciate her choice in Latin dance-pop and wanted to gain fans, who weren't acquainted with her music. "El chico del apartamento 512" was given mixed to positive reviews.