The Tom Brady–Bill Belichick era, also known as the Brady–Belichick era, the New England Patriots dynasty, or the Patriots dynasty, was a sports dynasty of the New England Patriots in the National Football League (NFL) that lasted from the 2001 to the 2019 season. The dynasty is named after quarterback Tom Brady and head coach Bill Belichick, who are regarded as among the greatest in their respective positions. Belichick and Brady are consistently credited with the Patriots' success and are considered responsible for one of the sport's longest and most dominant dynasties. They are also credited with helping to create and sustain the culture around the team, dubbed the "Patriot Way", where there is an emphasis on personal accountability, consistent improvement, and a focus on team success over personal gain.

The New England Patriots are a professional American football team based in the Greater Boston area. The Patriots compete in the National Football League (NFL) as a member club of the league's American Football Conference (AFC) East division. The Patriots play home games at Gillette Stadium in Foxborough, Massachusetts, which is 22 miles (35 km) southwest of Boston. The franchise is owned by Robert Kraft, who purchased the team in 1994. As of 2023, the Patriots are tied for the third most valuable sports team in the world and have sold out every home game since 1994.