The Old Kingdom is the name given to the period in the 3rd millennium BC when Egypt attained its first continuous peak of civilization in complexity and achievement – the first of three so-called "Kingdom" periods, which mark the high points of civilization in the lower Nile Valley (the others being Middle Kingdom and the New Kingdom).

The term itself was coined by nineteenth century historians and the distinction between the Old Kingdom and the Early Dynastic Period is not one which would have been recognized by Ancient Egyptians. Not only was the last king of the Early Dynastic Period related to the first two kings of the Old Kingdom, but the 'capital', the royal residence, remained at Ineb-Hedg, the Ancient Egyptian name for Memphis. The basic justification for a separation between the two periods is the revolutionary change in architecture accompanied by the effects on Egyptian society and economy of large-scale building projects.

The Old Kingdom is most commonly regarded as the period from the Third Dynasty through to the Sixth Dynasty (2686 BC – 2181 BC). Many Egyptologists also include the Memphite Seventh and Eighth Dynasties in the Old Kingdom as a continuation of the administration centralized at Memphis. While the Old Kingdom was a period of internal security and prosperity, it was followed by a period of disunity and relative cultural decline referred to by Egyptologists as the First Intermediate Period. During the Old Kingdom, the king of Egypt (not called the Pharaoh until the New Kingdom) became a living god, who ruled absolutely and could demand the services and wealth of his subjects. The numerous references to the Old Kingdom kings as pharaohs in this article stems from the ubiquitous use of the term "pharaoh" to describe any and all Ancient Egyptian Kings.

The Kingdom of Egypt (Egyptian Arabic: المملكه المصريه, literally, the Egyptian Kingdom), was the independent Egyptian state established under the Muhammad Ali Dynasty in 1922 following the recognition of Egyptian independence by the United Kingdom. The legal status of Egypt had hitherto been highly convoluted, due to its de facto breakaway from the Ottoman Empire in 1805, its occupation by Britain in 1882, and its transformation into a sultanate and British protectorate in 1914. In line with the change in status from sultanate to kingdom, the Sultan of Egypt, Fuad I, saw his title changed to King.

The kingdom's sovereignty was subject to severe limitations imposed by the British, who retained enormous control over Egyptian affairs, and whose military continued to occupy the country. Throughout the kingdom's existence, Sudan was formally united with Egypt, however, actual Egyptian authority in Sudan was largely nominal, due to Britain's role as the dominant power in Anglo-Egyptian Sudan.

Egypt ⁱ/ˈiːdʒɪpt/ (Arabic: مصر, Miṣr, Egyptian Arabic: [mɑsˤɾ] ; Coptic: Ⲭⲏⲙⲓ, Kīmi ; Sahidic Coptic: ⲕⲏⲙⲉ, Kēme), officially the Arab Republic of Egypt, Arabic:  جمهوريّة مصر العربيّة (help·info), is a country mainly in North Africa, with the Sinai Peninsula forming a land bridge in Southwest Asia. Egypt is thus a transcontinental country, and a major power in Africa, the Mediterranean Basin, the Middle East and the Muslim world. Covering an area of about 1,010,000 square kilometers (390,000 sq mi), Egypt is bordered by the Mediterranean Sea to the north, the Gaza Strip and Israel to the northeast, the Red Sea to the east, Sudan to the south and Libya to the west.

Egypt is one of the most populous countries in Africa and the Middle East. The great majority of its over 81 million people live near the banks of the Nile River, in an area of about 40,000 square kilometers (15,000 sq mi), where the only arable land is found. The large areas of the Sahara Desert are sparsely inhabited. About half of Egypt's residents live in urban areas, with most spread across the densely populated centres of greater Cairo, Alexandria and other major cities in the Nile Delta.