Castleisland Co-op Livestock Mart is a farmer owned co-operative which has been providing a livestock auctioneering service since it first opened in 1959. In that time it has grown to become one of the largest such centres in the country, selling livestock for farmers from all over Kerry, West Limerick and North and West Cork. 

As required by law, Castleisland Co-op Mart is registered with the Property Services Regulatory Authority under Licence Number 002537.

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.