Marietta is the name of several places in the United States of America:

• Marietta, Florida
• Marietta, Georgia (a suburb of Atlanta)
• Marietta, Illinois
• Marietta, Minnesota
• Marietta, Mississippi
• Marietta, New York
• Marietta, North Carolina
• Marietta, Ohio
• Marietta, Oklahoma
• Marietta, Pennsylvania
• Marietta, South Carolina
• Marietta, Texas
• Marietta, Wisconsin
• Marietta-Alderwood, Washington

Marietta is also used as a given name for females.

Also, Marietta was part of the name of Martin-Marietta Corporation, now part of Lockheed Martin, and is still part of the name of Martin-Marietta Materials, a supplier of construction materials (formerly a subsidiary of Lockheed Martin, spun off in 1996).