A West Australian man has died after allegedly being assaulted in a bar in Bali.

Balinese media are reporting Troy Johnston was allegedly hit with a stool while drinking in the Jimbaran area early Thursday morning.

Mr Johnston worked for mining company Rio Tinto in Perth.

"We are devastated by the news that one of our much loved and valued team members has tragically passed away overseas," the company said in a statement.

"Our thoughts and deepest sympathies are with Troy's family and friends, and we are providing them all the support we can during this very difficult time.

"Troy's colleagues are deeply saddened and we are providing them access to a range of support services."

The Department of Foreign Affairs and Trade has been contacted for comment.