the Olmec civilization is the oldest
The oldest largest civilization is the Iroquois
the oldest civilization was the OLMEC (:
the sumerians or ancient egypt
indus valley civilization
Olmec
Egypt(:
hadappa sanskriti is one of oldest civilization
Assyrian civilization
The Earth's oldest civilization was found in Mesopotamia around 4,000 BC. This was the sight where the Sumerian people lived. It is considered the cradle of civilization.
the Olmec civilization of Mexico.
A very debatable subject, however, I believe that either the Inca or Maya was the first earliest "real" and "organzied" civilization.