The 1998 Cairns Cyclones season was the third season that the Cairns Cyclones rugby league team competed in the Queensland Cup. The Queensland Cup became the premier level competition in the state in 1998 after the Brisbane Rugby League ceased at the end of the 1997 season. See Article: Brisbane Rugby League.
The Cyclones were one of sixteen clubs competing in the twenty-two-week-long competition. The Bundaberg Grizzlies re-joined the competition, the Townsville Stingers and Gold Coast Vikings joined for the first time and the Port Moresby Vipers left due to travel and accommodation costs. The Cairns Cyclones team was managed by Nigel Tillett and coached by Gary Smith.