As this hinterland has very many dairy and suckler farms, the mart has unique access to a regular supply of top class suck calves of all breeds, as well as some of the finest suckler weanlings in the country. There is also a huge selection of store cattle and cows for further feeding, as well as finished stock.
Castleisland Co-op Mart is also well known for its sales of Dairy stock, which are held regularly from November to May.