1999 Nasarawa State gubernatorial electionThe 1999 Nasarawa State gubernatorial election occurred in Nigeria on January 9, 1999. The PDP nominee Abdullahi Adamu won the election, defeating the APP candidate.Abdullahi Adamu emerged PDP candidate.Electoral systemThe Governor of Nasarawa State is elected using the plurality voting system.Primary electionPDP primaryThe PDP primary election was won by Abdullahi Adamu.ResultsThe total number of registered voters in the state was 702,021. Total number of votes cast was 634,095 while number of valid votes was 613,030. Rejected votes were 21,065.