Other Uses
- Metropolitan Atlanta Rapid Transit Authority, the principal rapid-transit system in the Atlanta metropolitan area
- Mountain Area Regional Transit Authority, the third largest regional transit agency in San Bernardino county
- Marta is the dubbed English name for Martel of Fullmetal Alchemist
- Marta (film), a 1971 Spanish film
- "Marta" (song), by Ricardo Arjona
- "Marta", a song by Alejandra Guzmán, from the album Indeleble
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