The members form local chapters, of which 3 are situated in the United Kingdom and Ireland, formerly BBYO District 15.
At the same time, small sororities began to spring up across North America, some using the B'nai B'rith Girls name.
It was not until 1944 that, under the leadership of Anita Perlman, BBG was officially established as an international Order, and recognised by B'nai B'rith.
In June 1940, a similar story unfolded in Ireland, as an AZA chapter was founded in Dublin by American M. Gordon.
Janet Ross worked as BBYO's first National Director from Hillel House in London.
In 1973, members from London, Hull, Manchester, Coventry and Nottingham chapters took part in BBYO's first ever Israel tour.
In 1981, Steven Kron from Dublin, became the first BBYO member from the UK & Ireland to hold a position on the International Board, as the Grand Aleph Shaliach.
In 1997, BBYO officially became a Zionist movement, passing a motion at National Convention, and the ideologies took the format that we know today.
BBYO "elders" (bogrim) make up the Youth Commission and they support the chapters and the National Exec in an advisory role.
The four active chapters in the United Kingdom and Ireland are (as of 2020): Borehamwood (Kehilah), Edgware (Deganya), JW3, North London (Mercaz), Manchester (Weizmann), Glasgow (Nessi), and Dublin.