The 23-year-old joined Ross County in October last year following his release from Go Ahead Eagles.
The Dutchman has scored eight goals this season, including a last-minute winner in the League Cup final.
The club are delighted to announce that Alex Schalk has signed a one year contract extensio, running to the end of of the 2016/17 season.
— Ross County FC (@RCFCStaggies) April 28, 2016