"Marta" is a Latin pop song recorded by Guatemalan recording artist Ricardo Arjona. It was released on 29 March 2011 as the third and final single from his twelfth studio album, Poquita Ropa (2010). It was written by Arjona, who produced it with longtime collaborators Dan Warner and Lee Levin under their stage name, Los Gringos. An accompanying music video for "Marta" was released in March 2011 and features Mexican actress Edith Gonzalez. It was directed by Joaquín Cambre. The video was used as part of the feature film Poquita Ropa — Una Historia Apasionada.

Poquita Ropa is similar in style to Arjona's work on Galería Caribe (2000). With the album, Arjona wanted to drastically change his musical style. He tried to use as few instruments as possible, resulting in a production that sounds like a cappella performances. Arjona talking about the album, stated that "music and women look better with little clothes", and that "they [the songs] are like women; they get things up and are so concerned about this that they forget that the less clothes, more beauty. The songs are often overwhelmed by ourselves, because we saturate them with arrangements looking to exalt their qualities and we end up hiding them."

Arjona produced the album with the assistance of Dan Warner, who has worked with Shakira, Celine Dion and Christina Aguilera. Jason Birchmeier from Allmusic commented that Poquita Ropa "finds Arjona at his most naked, backed by spare arrangements of acoustic guitar, piano, and Hammond B-3 along with occasional touches of strings, woodwinds, and chorus vocals."Poquita Ropa was the first album that Arjona recorded without producer Tommy Torres, whose last production was 5to Piso (2008).

"Marta" is a latin pop song that is "anchored by percussion," and was written by Arjona, who produced it alongside longtime collaborators Dan Warner and Lee Levin, under their stagename Los Gringos. Roger Silvestre Ramírez and Wendy Pedersen provided additional background vocals on the song, while Andrés Saavedra and Isaías García served as the recording engineers. Matt Rollings provided both the piano and its arrangements, as well as playing the Hammond B-3; Lee Levin performed the drums and percussion instruments while Briang Lang provided the bass. Jason Birchmeier from Allmusic praised the song, stating that it "pack[s] a punch." Arjona said that "Marta" is "one of those songs with brushworks related to something that happened, put on the magnifying glass of the author."

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