- Smyrna is a city located in Cobb County, Georgia, United States. It is a suburb of Atlanta and is part of the Atlanta metropolitan area. The city has a population of approximately 57,000 residents and covers an area of 15.44 square miles. Smyrna is known for its vibrant downtown area, which features various shops, restaurants, and entertainment options. The city also offers a variety of parks and recreational facilities, including the Silver Comet Trail and the Jonquil City Jog. Smyrna has a diverse community and a strong sense of community pride.