Abioseh Davidson Nicol (14 September 1924 – 20 September 1994) was a Sierra Leonean academic, diplomat, physician, writer and poet. He has been considered as one of Sierra Leone’s most educated citizens of recent times^{[citation needed]}, as he was able to secure degrees on the art, science and commercial disciplines.^{[citation needed]}

Nicol was born as Davidson Sylvester Hector Willoughby Nicol in 1924 in Freetown, the capital city of Sierra Leone. His family belonged to the Creole minority who were an educated and elite ex-slave community. He attended primary school in Nigeria and, in 1946, graduated from Christ's College, Cambridge University in the United Kingdom. He earned his Ph.D. in 1958 and lectured at the University of Ibadan in Nigeria.

Beginning in 1960, Nicol was the first native principal of the prestigious Fourah Bay College in Freetown (left in 1966) as well as a member of the Public Service Commission (left in 1968). Nicol continued his administrative career at the university level in Sierra Leone as first the chairman (1964–1969) then as Vice-Chancellor at the University of Sierra Leone (1966–1969).