MarĂa Isabel Arrieta Gálvez or Maribel Arrieta (August 22, 1934 – August 31, 1989) was a Salvadoran beauty queen where she represented her country at Miss Universe 1955 in Long Beach, California.
Arrieta is most known for her strong resemblance of Marilyn Monroe, leading people to dub her as "the Marilyn Monroe of El Salvador".
Arrieta ultimately finish as first runner-up, losing to Hillevi Rombin, but not before taking home the title of "Miss Congeniality".