London based Arsenal Football Club has developed a strong following since its founding in 1886. Since the 1980s, Arsenal's fans have often been referred to as Gooners, a derivative of the team's nickname, the "Gunners".

Many fanzines, blogs, podcasts and fans websites have been dedicated to the club and the fans have long-standing rivalries with several other clubs, the most notable of which is with near neighbours Tottenham Hotspur, with whom they regularly contest the North London derby.

The club and the fans have regularly featured in portrayals of football in British culture but Arsenal fans come from far and wide; a 2005 report estimated Arsenal's global fanbase at 112 million, the third-largest in the world.^{[better source needed]} A September 2011 report estimated Arsenal's fanbase at 100 million worldwide, still making them the third-largest team in terms of supporters.^{[needs update]}

Arsenal fans have long been stereotyped for the dissatisfaction they appear to feel – and express – towards their club. Sometimes the regular low-level grumbling will erupt, with severe criticisms and bitter feelings being aired. An example of this in the 2010s was a vociferous group – dubbed "The Anti-Arsenal Arsenal" – that had manager Arsène Wenger as the principal target of their dissatisfactions. However, the perception of Arsenal fans as being hard to please is an old one. Even at times of success antagonism was noted. Such was the experience of the title winning teams of 1953 and 1971. Not even the figure behind the successful 1930s team successes was spared: Herbert Chapman complained of the activities of the "boo-boys" and title-winning manager George Graham was strongly criticised over choice of players and tactical strategy.

In 2010, Arsenal supporters became the first fans of a Premier League club able to buy percentages of a stake in Arsenal through a "fanshare" scheme, therefore giving them rights to attend shareholders meetings.

Arsenal's performance in home matches have resulted in them having the second-highest average League attendance for an English club during the 2007–08 season, (60,069, which was 99.5% of available capacity), and as of 2006, the fourth-highest all-time average attendance. Arsenal have the highest proportion (7.7%) of non-white attending supporters of any club in the Premier League, according to a 2002 report.

There are supporters' clubs worldwide. A 2005 report by Granada Ventures, which at the time owned a 9.9% stake in the club, estimated Arsenal's global fanbase at 27 million, the third-largest in the world.

In addition to the usual English football chants, Arsenal's supporters sing "One-Nil to the Arsenal" (to the tune of "Go West") and also regularly sing "Who's that team they call the Arsenal", "Good Old Arsenal" (to the tune of "Rule, Britannia!") and "We're the North Bank/Clock End Highbury". The fans also chant "Boring, Boring Arsenal" in self-deprecating reference to Arsenal's reputation during the 1970s and 1980s as an overly defensive, cautious team. The team's new (May 2022) anthem is "The Angel (North London Forever)" by Louis Dunford.