Wagg, 37, departs after 10 years with Glamorgan, having been unable to agree terms on a new contract with the Club.
The all-rounder played 96 first-class games for the Welsh county, scoring nearly 4,000 runs with four centuries, including a double-century against Surrey at Guildford in 2015.
He also took 249 wickets first-class wickets for the club, with four five-wicket hauls and a career-best 6/29 at The Oval in 2014.
In 64 List appearances, the left-arm seamer took 70 wickets with a best 4/45 at The Oval in 2012 and scored 1,159 runs.
In T20 cricket, Wagg’s 99 games brought nearly 1,000 runs and 95 wickets, where he sits second on Glamorgan’s all-time wicket charts, with a T20 best of 5/14 against Worcestershire in 2013.
Wagg was awarded his County Cap in 2013, a Testimonial Year in 2019 and was Glamorgan’s Player of the Year in 2015.
Speaking on his departure from Glamorgan, Wagg said: “I have loved my time at Glamorgan and have made Wales home
“The fans have been a truly special part of my time here, and the support they have shown me has been something I will never forget.
“I still have that burning desire to play cricket that I did all those years ago, and while I am sad to be leaving the Club, it will always have a special place in my heart and I leave with nothing but positive feelings to Glamorgan.”
Director of Cricket, Mark Wallace, added: “Graham’s wholehearted and passionate style have been a feature of his 10 years at the club making him popular with both players and supporters alike.
“He has influenced games for the club with both bat, ball and in the field and his timeless energy will certainly be missed both inside and outside the dressing room.
“Graham leaves the club with our best wishes for the future.”
Help keep news FREE for our readers
Supporting your local community newspaper/online news outlet is crucial now more than ever. If you believe in independent journalism, then consider making a valuable contribution by making a one-time or monthly donation. We operate in rural areas where providing unbiased news can be challenging. Read More About Supporting The West Wales Chronicle