Keane replaced Jim Magilton at the helm with just two games of the season remaining and claimed a maximum six-point haul against Cardiff and Coventry.
And the club's ticket and call centre manager John Ford, who believes the future looks bright for the Championship outfit, told the club's official website: "Roy Keane coming in as manager has certainly seen a boost in season-ticket sales and we are now over the 15,500-mark.
"We have had a 6% increase in Early Bird season-ticket sales compared to last year and we have already sold 150 or so more tickets this year than we finished with last season.
"We're still getting a steady flow of supporters purchasing tickets for next year as well and there certainly seems to be a buzz of excitement amongst the fans."
Veliche Shumulikoski has been called up to the Macedonia squad for their World Cup qualifiers against Norway and Iceland next month, while Jaime Peters is included in the Canada squad for their friendly with Cyprus.