As of 2014, the estimated population of Athens, Greece, is 665,000. This number is a drop of over 100,000 residents since 2004, when the population was 796,400. The city's population decline is attributed to its aging residents and the poor economic outlook in the country.
The population density per square mile is 44,140 people. The Athens metropolitan area, which includes 58 municipalities, has a population of 3.75 million as of 2014.
Athens is one of the oldest cities in the world; its history goes back over 3,400 years. During the Greek Classical Period, Athens held a population of between 350,000 and 610,000 residents.