1961 British Cameroons referendum

A United Nations referendum was held in British Cameroons on 11 February 1961 to determine whether the territory should join neighbouring Cameroon or Nigeria. This followed an earlier plebiscite in Northern Cameroon in 1959 which voted to postpone a decision. The option of independence was not on the ballot, having been opposed by Andrew Cohen, the UK representative to the UN Trusteeship Council, as well as African and anti-colonial delegations, notably by E. M. L. Endeley, who favoured integration with Nigeria, and John Ngu Foncha, who favoured (eventual) reunification with Francophone Cameroon.[1]

1961 British Cameroons referendum

a) Do you wish to achieve independence by joining the independent Federation of Nigeria or, b) Do you wish to achieve independence by joining the independent Republic of Cameroon?
Northern Cameroons
Federation of Nigeria   59.97% Republic of Cameroon   40.03%
Southern Cameroons
Federation of Nigeria   29.50% Republic of Cameroon   70.50%

The Muslim-majority Northern Cameroons saw a majority of 60% in favour of joining Nigeria, whilst the Christian-majority Southern Cameroons saw 70.5% in favour of integration with Cameroon.[2] Northern Cameroon officially became Sardauna Province, a part of the Northern Region of Nigeria, on 1 June, whilst Southern Cameroons became West Cameroon, one of the two federated states of the Federal Republic of Cameroon, on 1 October.