It will be hosted at the Vietnam War Memorial in the Deniliquin Waring Gardens, behind the Deniliquin Cenotaph.
The Deniliquin RSL Sub-branch will host the 11am service.
Vietnam Veterans Day marks the anniversary of the Battle of Long Tan - considered a significant moment in Australia's war in Vietnam.
On August 18, 1966, in a rubber plantation near the village of Long Tan, Australian soldiers fought one of their fiercest battles of the war.
Historical information provided by the Department of Veterans Affairs tells us the men of Delta Company, 6th Battalion Royal Australian Regiment, faced a force of some 2000 North Vietnamese and Viet Cong troops.
The battle was fought in wet and muddy conditions during a heavy tropical downpour.
By the end of the day, 17 Australians had been killed in action and 25 were wounded. One died in the days following.
This was the largest number of casualties in a single operation since the Australian Task Force had established its base at nearby Nui Dat the previous April.
Vietnam Veterans Day remembers the combined sacrifices of these men, and recognises the almost 60,000 Australians who served during the 10 years of Australia’s involvement in the Vietnam War.
The service follows a Vietnam Veterans Vigil held by the sub-branch earlier this month, which marked 50 years since the withdrawal of combat troops in 1972 and 60 years since the Australian Army Training Team Vietnam (AATTV) arrived in Vietnam.