Herbert Chapman (January 19, 1878 – January 6, 1934) was an English football player and manager.

As a player, Chapman played for a variety of clubs, at League and non-League levels. His record was generally unremarkable as a player, making fewer than 40 League appearances over the course of a decade and he did not win any major honours. Instead, he found success as a manager, first at Northampton Town between 1908 and 1912, whom he led to a Southern League title.

This attracted the attention of larger clubs and he moved to Leeds City, where he started to improve the team's fortunes before World War I intervened. After the war ended, City were implicated in an illegal payments scandal and were eventually disbanded. Chapman was initially banned from football but successfully appealed, and then took over at Huddersfield Town, winning an FA Cup and two First Division titles in the space of four years.

In 1925 Chapman was tempted to move to London club Arsenal, and brought the previously trophyless club an FA Cup and two First Division titles. He set them up to be the dominant team of the 1930s — they would eventually win five League titles that decade — but he did not live to see them to do so, dying suddenly from pneumonia in 1934, at the age of 55.

Not only credited with turning round the fortunes of both Huddersfield Town and Arsenal, he is also regarded as one of the game's first modernisers. He introduced and new tactics and training techniques into the English game, as well as championing innovations such as floodlighting, continental football and numbered shirts, and has received many posthumous honours in recognition.