A total of £1,930,836 (down from £2,347,749 last season) was paid by League One clubs during the campaign, as part of £21.7million received across the Football League.
£18.7m of that was in the Championship, where Leicester City (£1.8m) paid the most.
Hartlepool United were the only League One club to not pay any agents fees. Sheffield Wednesday (£332,620) paid the most.
Of the 935 player transfers in League One last season, only 175 were arranged by an agent.
“While £21m is a lot of money leaving the game, it should also be noted that a considerable amount of this total has been spent by a small number of clubs. In fact, almost a fifth of the overall figure was spent by one club alone, said Greg Clarke, chairman of the Football League.
“Where such spending forms part of a sustainable business plan it shouldn’t be of great concern and supporters should be encouraged to see our clubs committing themselves to the new Financial Fair Play regulations that will take effect across all three divisions in the new season.
“In time, these rules will require clubs to be more circumspect with regard to their spending and may help reduce the costs incurred in this area.”