Classical archaeology in its strictest, most traditional sense applies only to the study of Classical Athenian culture and the culture of the Roman Republic and Empire. However, over the course of the last century, the field has expanded to include discussions of the elaborate mosaic of cultures that produced the civilizations of Ancient Greece and Rome. Classical archaeologists interested in Greece frequently discuss civilization present on that island during the Bronze Age. Even during the Classical period, it is completely untrue to say that Greece had one true culture - a great deal of regional variation was present, and much of the study of Greek archaeology lies in examination of these regional differences. Greek archaeology covers the Hellenistic period as well, frequently compelling the classical archaeologist to examine the Greek influences present in all the areas, including much of the Middle East and Egypt.

Classical archaeologists interested in Roman civilization discuss the influence and other early cultures present on the Italic Peninsula. They also discuss the subcultures present within the Roman Republic and Empire based on regional differences.