Emergency services were called to Boxyards Road at Booligal, around 75 kilometres north of Hay, on Friday evening after receiving reports of a single-vehicle crash.

The ATV was heading west when it flipped just after 8pm, police said, and witnesses and officers who were first at the scene performed CPR on the 54-year-old until paramedics arrived.

However man died at the scene.

"Officers from Murrumbidgee Police District were told an ATV was being ridden westbound, when the rider reportedly swerved to avoid a collision with a kangaroo and flipped," NSW Police said.

A crime scene was established at the crash site as police investigate the circumstances surrounding how it unfolded, and a report will be prepared for the coroner.

"Anyone with information about this incident is urged to contact Crime Stoppers on 1800 333 000," police said.