Fulham took 16 points from 17 in April - a run of results that has seen them clinch a play-off place at the expense of Leeds United with a game to spare.
Jokanovic will go up against Carlos Carvahal of Sheffield Wednesday, who also saw his side into the play-off places last month after taking 19 points from seven unbeaten games, Nigel Clough of Burton and Lee Johnson of Bristol City.
Meanwhile, Johansen has been shortlisted for Player of the Month after he scored four goals, including two against Huddersfield in the 4-1 win which complemented a good month for the Norway captain.
John Brayford of Burton, Yann Kermogant of Reading and Glenn Murray of Brighton have also been shortlisted for the award.
The winners will be announced tomorrow, Friday May 5.