The Leinster Junior Challenge Cup was the forerunner of the Leinster Towns Cup.
It was established as a competition for clubs below senior level who were affiliated to the Leinster branch of the Irish Rugby Football Union. The first competition was played during the 1888-1889 season.
The conditions of the competition were changed for 1926 competition and only teams who were located at least 18 miles from the General Post Office in O'Connell Street were eligible to compete.