PPR took the fashion world by surprise last month by announcing the departure of Ghesquiere, its designer of 15 years, who put the house founded by Spaniard Cristobal Balenciaga in 1919 back on the fashion map in his time there.
The trade magazine Women's Wear Daily had reported on Friday - the last day of Ghesquiere's contract - that Wang had been picked to succeed him.
Isabelle Guichot, Balenciaga's chief executive, paid tribute in the statement to Wang's "proven talent, modernity and individual and cosmopolitan vision of design".
She predicted he would "naturally embrace and enrich the unique heritage of this fashion house which will soon be one hundred years old".
PPR, whose fashion labels include Gucci, Yves Saint-Laurent, Alexander McQueen and Stella McCartney has owned Balenciaga since 2001.
Turnover had been multiplied by 11 since the house was acquired by PPR, with two-figure growth for the first nine months of this year.
Industry experts suggested the choice of Wang, who speaks Mandarin and whose own-name brand has been pushing into Asia, could signal a willingness to focus on the vast Chinese market, building on PPR's strong presence in the region.
In Paris meanwhile, the designer has already received a high-profile endorsement after Karl Lagerfeld let slip at an exhibition launch this month that he was wearing an Alexander Wang overcoat.
- COVER MEDIA