The central defender has been strongly linked with a move to Barcelona after yet another impressive campaign with the German side, but Reus is desperate for the squad to stick together.
Mario Gotze has already agreed a move to rivals Bayern Munich, but Reus is hoping that there will be no more exits - particularly Hummels, who he describes as a "complete player".
"I hope no player leaves Dortmund - not Hummels nor anyone else," Reus told AS. "We're a family and we have a contract. The atmosphere in the dressing room is very good and we feel well in the club and the city.
"In the coming years he will be world class, but now, despite his age, he already has experience," Reus continued. "He has great vision to take the ball from the back and become a good creator for attacking play.
"Moreover, in case anyone forgets, Hummels is also good in front of the opposition goal, so that makes him a complete player."
Dortmund drew 1-1 with Bundesliga champions Bayern Munich on Saturday.