战歌（英语：Fight Song），或译“体育战歌”、“战斗歌”，是起源于美国和加拿大的体育词汇，指专业或业余体育比赛中与特定队伍相关，观众所用以表达团结和对其支持的歌曲。美国常用“Fight Song”一词，新西兰及澳大利亚多用“Team Song”。

许多大学拥有自己的体育战歌，有些已经超过一百年历史，最早的战歌是创作于1885年的波士顿学院战歌，《为了波士顿》（For Boston）。

在亚洲地区的棒球比赛中，战歌经常在一个球队在大量得分的情况下出现，而球员和球迷也因为战歌而热血沸腾。

In American and Canadian sports, a fight song is a song associated with a team. In both professional and amateur sports, fight songs are a popular way for fans to cheer for their team. Although the term "fight song" is primarily used in America, the use of fight songs is commonplace around the world, but they may be referred to as team anthems, team songs or games songs in other countries, such as Australia, Mexico and New Zealand. Fight songs differ from stadium anthems, used for similar purposes, in that they are usually written specifically for the purposes of the team, whereas stadium anthems are not.