The World Association of Girl Guides and Girl Scouts (WAGGGS) was formed in 1928 and has member organisations in 145 countries. There are now more than 10 million members worldwide.

Girl Guides and Girl Scouts are a Scouting movement found worldwide, originally and still largely designed for girls and women only. These organisations evolved with girls wanting or demanding to take part in the then grassroots 'Boy Scout' Movement.

In different places around the world, the movement developed in diverse ways. In some places, girls joined or attempted to join Scouting organisations. In other places, girls' groups were started independently, some of them later opening up to boys or merging with boys' organisations. In other instances, mixed groups were formed, sometimes to later split. In the same way, the name Girl Guide or Girl Scout has been used by groups at different times and in different places, with some groups changing from one to another.

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