Fifth-century Athens was the Greek city-state of Athens in the time from 480 to 404 BC. Formerly known as the Golden Age of Athens, the latter part being the Age of Pericles, it was buoyed by political hegemony, economic growth and cultural flourishing. The period began in 478 BC, after the defeat of the Persian invasion, when an Athenian-led coalition of city-states, known as the Delian League, confronted the Persians to keep the liberated Asian Greek cities free.

Athens is the capital and largest city of Greece. A major coastal urban area in the Mediterranean, Athens is also the capital of the Attica region and is the southernmost capital on the European mainland. With its urban area's population numbering over three million, it is the eighth largest urban area in the European Union. The Municipality of Athens, which constitutes a small administrative unit of the entire urban area, had a population of 643,452 (2021) within its official limits, and a land area of 38.96 km2 (15.04 sq mi).