Warn, who will hold the position on an initial three-year term, has spent most of his career working in the technology side of the sports media and betting sector.
His previous experience includes time at Sportinglife.com, Blue Square, Sky Betting & Gaming and most recently as the managing director of Perform's Media Division in Leeds.
Warn said: "I'm delighted to be joining Go Racing In Yorkshire, as their chairman. An opportunity to combine two of my biggest passions; Yorkshire and horse racing was too good to miss.
"We have nine amazing racecourses in the county, I am looking forward to being able to support them to drive further engagement with a wider audience."
Acting chairman, John Sanderson, said: "On behalf of the board and the nine Yorkshire Racecourses I am delighted to welcome Ben to Go Racing In Yorkshire as our new chairman.




