Alexander Wang was born in San Francisco and was the youngest of three children. When he was 10, his parents migrated to China while he remained in the United States and enrolled in schools in California. In 1999, he attended summer courses at Central Saint Martins in London, later on designing his first collection of clothes and debuting it at the wedding of his elder brother.
In 2002, Wang enrolled at the Parsons School of Design in New York and worked part-time at Barneys in the shoe department. By 2005, in his portfolio included internships at Marc Jacobs and Derek Lam, and even appearing in Teen Vogue and Vogue. He then dropped out of university and created a line of four cashmere sweaters, which became a big hit with buyers in New York City and landed him features in The New York Times and Vogue.
In 2007, Alexander Wang debuted at New York Fashion Week, and in 2008 he collaborated with Uniqlo to design a five-piece dress collection—this sold out within 30 minutes after it was released in Tokyo. In the same year, Wang was the recipient of the CFDA/Vogue Fashion Fund.
In 2009, his namesake label was supplemented by several lines—sports T by Alexander Wang, men's clothing and accessories. Two years later, Wang was named the best new menswear designer according to GQ magazine and received three nominations by the Council of Fashion Designers of America. In 2012, when Nicolas Ghesquière stepped down as creative director from fashion house Balenciaga, Wang took over the role for three years. In 2014, he created a collection for Swedish fashion retailer H&M—following the footsteps of iconic designers such as Karl Lagerfeld, Alber Elbaz (Lanvin), Donatella Versace, Isabelle Maran, and many others.