RSL NSW has cancelled all its services following talks with the state government on Monday after social gatherings of more than 500 people were banned.

RSL Orange sub-branch president Chris Colvin said the cancellations included the dawn and 11am services and other activities at the Orange Ex-Services' Club.

He said potentially it could also lead to clubs and pubs having to call off their traditional Anzac Day two-up games.

Mr Colvin said it would be impossible to limit the services to less than 500 people to meet the government's restrictions.

He said the dawn service in Orange attracted 2000-5000 people while the 11am service attracted about 12,000 people.

"There would be 500 Diggers marching. We have 2500 [children] marching," he said.

"We were prepared for the worst case scenario," he said.

"You can't hold a service. All our services are open to the public.

"[For me] it is the worst Anzac Day."

Mr Colvin asked people to still commemorate the day with a personal visit to the Cenotaph in Robertson Park.

"Maybe it would be a nice gesture for people to come down and maybe lay a wreath or a flower and have some personal quiet time," he said.

Mr Colvin said he would visit the Cenotaph early on Anzac Day to raise the flags and lay a wreath.

RSL NSW acting president Ray James said the "risk to vulnerable people during the current health situation was simply too high for these events to continue in their traditional format".

"Given the significant concerns around the spread of COVID-19, it would be irresponsible to allow such large gatherings as we see each year on Anzac Day to go ahead," he said.

"This is not a decision we have taken lightly.

"The RSL has a responsibility to act in the best interests of veterans and the general public.

"In these uncertain times we must follow the advice of medical experts and do everything we can to protect the community."

Mr James said the day would still be marked.

"Anzac Day as a marker of our respect and admiration for Anzacs past and present will still be observed," he said.

"The RSL will still honour the service and sacrifice of our brave servicemen and women."

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