From humble beginnings in 1864, the show has grown into a two-day extravaganza of family fun, various demonstrations and agricultural and craft exhibits.

The Governor-General, Sir Peter Cosgrove, will visit the show on Thursday, where he will inspect its various exhibits and attend the Australian Wool Innovation sheep presentation in one of his first visits to regional NSW since his appointment.

The Show Society's event co-ordinator, Alan Lean, has described this year's milestone as "huge" for the event.

"Not too many organisations last for 150 years, particularly organisations based on volunteering," he said.

"To think this has been able to develop and evolve and be innovative enough to continue to be of interest to the community is a wonderful achievement."

The show will be officially opened at 7.45pm on Thursday before the 2014 Wagga Showgirl is announced at 8.20pm.

Among the highlights will include a performance by a team of bullocks - which Mr Lean said was happening for the first time in recent memory - and a memorabilia display in the Kyeamba Smith Hall, which will take showgoers down memory lane.

But those attractions are only the tip of the iceberg, according to Mr Lean.

"It's five hours of non-stop entertainment," he said.

"It's not possible for me to pick out one (thing) that's the major highlight."