Who was the first black president of Ghana ?
The first black president (and indeed the first president of any race) of Ghana was Kwame Nkrumah. He became the prime minister of Ghana when that country gained its independence from Great Britain in 1957. At that point, the Queen of England was still the official head of state for Ghana. In 1960, Nkrumah succeeded in getting Ghanaians to ratify a new constitution, making Ghana a republic. Under the new constitution, there was a president who was both head of state and head of government. Nkrumah became that president, the first president of Ghana.
Before independence, the country of Ghana had not existed. The area that is now Ghana had been a British colony called the Gold Coast since 1867. Before the Europeans came, that general area had been ruled by a variety of native kingdoms. There had been no state that controlled all of the area that is now Ghana. The Gold Coast was created by the British. This means that before independence in 1957, there had never been a country called Ghana.
Nkrumah remained as president of Ghana until he was overthrown in 1966.