If you are talking about civilizations and settled people, it is the Sumerians which lived between the Mediterranean Sea and the Persian Gulf, more specifically between the Tigris and Euphrates River.
If you are talking about empires and places under one rule, it is the Akkadians ruled by Sargon in the same place (Sargon's army took over the Sumerians.)
If you are talking about kingdoms like monarchies and medieval times like present-day England, it is the Monarchy of Denmark, which is over 1000 years old.
If you are talking about animal kingdoms, it is probably dinosaurs or still surviving, birds and fish.
If you are talking about the Six Kingdoms, the oldest out of all of them is Archeabacteria.
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 oldest Female to walk the Earth was: Jeanne Calment, she died in France on the 4th of August 1997 at the age of 122 years and 164 days old. She was born on the 21st of February 1875. The oldest Male to walk the Earth was: Christian Mortensen, he died in the United States on the 25th of April 1998 of 115 years and 252 days old. he was born on the 16th of August 1882.
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The oldest president in the world was Somalia's first president Aden Abdullahi Cadi, who was born in 1908 and died in the year 2007. His was known as the oldest living president in the world until his death in 2007.
Old Testament is the oldest religious book on earth which was written by prophe moses
The oldest known and simplest organisms are part of the Archaebacteria kingdom. Members of this kingdom are one celled organisms and are also the most ancient organisms.
bacteria
Denmark is the oldest still existing kingdom in the world. Officially since 995 AD. Japan is the oldest still existing empire in the world and thereby the oldest monarchy.
The kingdom that has existed for at least 3 billion years is the Kingdom Bacteria. Bacteria are single-celled organisms that have been on Earth for billions of years and are among the oldest forms of life on our planet.
the oldest satellite is the HubbleMoon
The world's oldest currency still in use is Pound Sterling (The currency of the United Kingdom).
The Bristlestone Pine is the oldest not largest, it is estamted that the oldest living one on earth at the moment (Methuseslah) is 4,767 years old.
Hydrogen
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armenians.
the dutch
The oldest country in Oceania is Australia, due to declaring its independence from The United Kingdom in 1200.