The Girl Scouts of the United States of America (GSUSA) is a youth organization for girls in the United States and American girls living abroad. The Girl Scout program, which developed from the concerns of the progressive movement in the United States, sought to promote the social welfare of young ladies and was formed as a counterpart to the Boy Scouts of America (BSA). It was founded by Juliette Gordon Low in 1912 and is based on the Scouting principles developed by Robert Baden-Powell.

The GSUSA uses the Scout method to build self-esteem and to teach values such as honesty, fairness, courage, compassion, character, sisterhood, confidence, and citizenship through activities including camping, community service, learning first aid, and earning numerous badges by acquiring other practical skills. Girl Scouts' achievements are recognized through rank advancement and by various special awards. GSUSA has programs for girls with special interests, such as water-based activities.

Membership is organized according to age group with activities designed appropriately for each level. The GSUSA is a member of the World Association of Girl Guides and Girl Scouts (WAGGGS), and has a long history of accepting girls from all backgrounds.