The United States national rugby union team, nicknamed the Eagles, is controlled by USA Rugby. USA Rugby is a member of Rugby Americas North, one of six regional governing bodies under World Rugby. Until sevens made its debut at the 2016 Rio Games, the United States was the reigning Olympic champion in rugby, having won gold at the 1920 and 1924 Summer Olympics.

As of March 4, 2018, the Eagles are ranked 15th in the world by the World Rugby Rankings. Their highest ranking, achieved ahead of the 2007 World Cup, was 14th; their lowest ranking was 20th, following a winless campaign in the 2008 Churchill Cup.

The highest profile tournament in which the Eagles play is the Rugby World Cup. The Eagles have played in all but one Rugby World Cup since the tournament began in 1987. The United States has expressed interest in hosting the 2027 Rugby World Cup.

The United States competed in the Pacific Nations Cup every Summer from 2013 to 2015. Previously, the U.S. has competed in the now-defunct Churchill Cup and the Pan American Championship. In April 2015, USA Rugby announced the creation of a new, annual International Championship to be contested among the top-6 ranked rugby nations in the Americas: Argentina, Brazil, Canada, Chile, Uruguay and the United States. The contest was named the Americas Rugby Championship and began in 2016. The United States won the 2017 Americas Rugby Championship after drawing with Argentina XV. It was the United States' first 15-a-side rugby union title in over 90 years.

Informal football games such as rugby became popular in the United States in the mid-19th century. Rugby union was played as early as 1872 among rugby clubs in the San Francisco Bay Area composed mainly of British expatriates. On December 2, 1882, the first Californian representative rugby team to play an outside opponent, took on a group of rugby-playing ex-Britons, who called themselves the Phoenix Rugby Club of San Francisco. California lost to the Phoenix club 7–4.

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