The Lleyn Sheep Society was founded over 50 years ago (as part of the Welsh Agricultural Organisation Society). The idea was to help members promote and sell their quality Lleyn sheep. To this end, over the years, the Society has established a network of successful Sales across the UK and the Republic of Ireland.

The Society is governed by a Council of elected regional members who make all of the day-to-day decisions needed for the Society to function. In addition there are 3 sub-committees: Promotions, Breed Development and Next Gen, where matters are discussed in detail and recommendations made to the Society Council.

Communication from the Society to its members is through social media, regular Newsletters and the annual Handbook. There is also the opportunity for Officers and Committee members to interact with the membership at the Annual General Meeting which is hosted each year by a different Region.