The new strategic partnership covers a number of areas including marketing, content collaborations, tailored membership packages, summer camps, fan engagement and the pre-season training bases for Academy teams at both clubs amongst others.
“This is a very positive day for Sligo Rovers. We have a shared history with Everton Football Club over many decades and I also believe we have the same principles and ambitions to grow. They are a perfect fit for us for a collaboration such as this, " Sligo Rovers chairman Donal Higgins said.
“Partnering with Everton will allow us to improve in many key areas, such as commercial activity, fan services and also the development of our academy coaches, which is of utmost importance.
“We have very talented staff and a group of coaches at the club who will learn and develop from the basis of this link-up.
“We hope it is the beginning of a very fruitful partnership and perhaps, in time, more names will be added to those that have proudly represented Sligo Rovers and Everton."
Former Sligo player Seamus Coleman added: "I’ll be forever grateful to Sligo for giving me my start in professional football and for helping to pave the way for my move to Everton, the Club I am proud to captain and represent each and every day.
"This partnership will benefit both clubs and, in particular, can provide support to Sligo from the social and economic impact of the coronavirus pandemic."