Thom Browne, born Tom Browne (born September 27, 1965) is an American fashion designer and the founder and head of design for Thom Browne, a luxury fashion brand based in New York City. Browne debuted his womenswear collection in 2014.

In 2023, Browne became the chairman of the Council of Fashion Designers of America, succeeding Tom Ford.

Browne was born on September 27, 1964, in Allentown, Pennsylvania, into an Irish-Italian family. He attended Catholic school until seventh grade and served as an altar boy, and later attended and graduated from William Allen High School in Allentown.

He attended the University of Notre Dame, where he was a member of its track and field team and graduated with a degree in economics.

Browne pursued an acting career in Los Angeles from 1992 to 1998. He added the "H" to his birth name Tom because his name was taken by someone else in the Screen Actors Guild. He also worked as a production assistant and script reader on films.

Browne started making custom suits after befriending Johnson Hartig, who went on to found the brand Libertine. He moved to New York City in 1997, where he began working as a salesman at Armani's wholesale showroom. Club Monaco, then a Polo Ralph Lauren brand, later selected him to lead its creative development team, where he worked with American fashion designer Ralph Lauren. Browne led Club Monaco's design department for several years before launching the Thom Browne label.

Browne started his eponymous business with made-to-measure suits in 2001, with its first shop in New York's West Village.

Thom Browne's breakthrough is considered to be his reimagining of the suit, shrinking the proportions and cutting the fit closer to the body, encapsulated by his signature grey suit. His preferred fabric is Super 120's wool twill in "medium gray". Every Thom Browne piece includes a red-white-and-blue striped grosgrain ribbon.