The commonwealth realm of Uganda, to give its official name, known simply as Uganda, was a predecessor to modern-day Uganda

Uganda

Uganda , officially the Republic of Uganda, is a landlocked country in East Africa. Uganda is also known as the "Pearl of Africa". It is bordered on the east by Kenya, on the north by South Sudan, on the west by the Democratic Republic of the Congo, on the southwest by Rwanda, and on the south by...

 and an independent state that existed between 1962 and 1963. When British rule ended in 1962, Uganda was given independence as a commonwealth realm, in which the state existed until the proclamation of the state in 1963, The 'State of Uganda' came into existence on 9 October 1963.
The description of the 'state' was implicitly implying that the post-commonwealth realm state was not a republic; given that it was a 'federation of tribal kingdoms'. Uganda did not de jure become a republic until 1966 and Milton Obote's conflict with President Edward Mutesa II (see below.)
During the commonwealth realm phase, the British monarch remained head of state

Head of State

A head of state is the individual that serves as the chief public representative of a monarchy, republic, federation, commonwealth or other kind of state. His or her role generally includes legitimizing the state and exercising the political powers, functions, and duties granted to the head of...

 of Uganda, and was represented in Uganda by a governor-general

Governor-General

A Governor-General, is a vice-regal person of a monarch in an independent realm or a major colonial circonscription. Depending on the political arrangement of the territory, a Governor General can be a governor of high rank, or a principal governor ranking above "ordinary" governors.- Current uses...

. The following governor-general held office in Uganda during the commonwealth realm period:

1. Sir Walter Coutts
   Walter Coutts
   Sir Walter Fleming Coutts, KCMG, MBE was a British colonial administrator and was Uganda's last Governor before independence, from 1961–1962. He was Governor-General of Uganda 1962–1963.-See also:...
   
    (9 October 1962 - 9 October 1963)

Milton Obote

Milton Obote

Apolo Milton Obote , Prime Minister of Uganda from 1962 to 1966 and President of Uganda from 1966 to 1971, then again from 1980 to 1985. He was a Ugandan political leader who led Uganda towards independence from the British colonial administration in 1962.He was overthrown by Idi Amin in 1971, but...

 held office as prime minister

Prime minister

A prime minister is the most senior minister of cabinet in the executive branch of government in a parliamentary system. In many systems, the prime minister selects and may dismiss other members of the cabinet, and allocates posts to members within the government. In most systems, the prime...

 (and head of government

Head of government

Head of government is the chief officer of the executive branch of a government, often presiding over a cabinet. In a parliamentary system, the head of government is often styled prime minister, chief minister, premier, etc...

) of Uganda during this period.
Following the abolition of the Commonwealth Realm, the Kabaka (King) of Uganda, Edward Mutesa II became the first President of the new 'State of Uganda'.

See also

• Governor-General of Uganda
• Elizabeth II
• Uganda Protectorate
• Walter Coutts
  Walter Coutts
  Sir Walter Fleming Coutts, KCMG, MBE was a British colonial administrator and was Uganda's last Governor before independence, from 1961–1962. He was Governor-General of Uganda 1962–1963.-See also:...
  
  
• Edward Mutesa II
• Milton Obote
  Milton Obote
  Apolo Milton Obote , Prime Minister of Uganda from 1962 to 1966 and President of Uganda from 1966 to 1971, then again from 1980 to 1985. He was a Ugandan political leader who led Uganda towards independence from the British colonial administration in 1962.He was overthrown by Idi Amin in 1971, but...