Vietnamese Casualties
The number of military and civilian deaths from 1959 to 1975 is debated. To illustrate the problem, below are three reference works by three or more authors listing casualty figures. What is remarkable about them is that the only ones that seem to match are the ones that are approximations. None of the figures include the members of South Vietnamese forces killed in the final campaign. Nor do they include the Royal Lao Armed Forces, thousands of Laotian and Thai irregulars, or Laotian civilians who all perished in that peculiar conflict. They do not include the tens of thousands of Cambodians killed during the civil war or the estimated one and one-half to two million that perished in the genocide that followed Khmer Rouge victory
Documents declassified by the Vietnamese government in 1995 revealed that 5.1 million people died during the Hanoi's conflict with the United States. Four million civilians died in the North and South. Total military casualties were put at 1.1 million and 600,000 wounded. Hanoi concealed the figures during the war to avoid demoralizing the population.[125]
Source: Wikipedia
Quick answer: Approximately 5.4 million total.
Regarding American casualties, see http://www.vhfcn.org/stat.htm :
The official number is 58,148 killed during service. An additional 114
were captured and died in captivity.
In the 5 years following the war, the suicide rate of veterans was 1.7
times the non-Veteran population, yielding an estimate of 9,000
suicides as a direct result of the war. After 5 years, suicide rates
fall back in line with the general population.
(Testimony by Dr. Houk, Oversight on Post-Traumatic Stress Disorder,
14 July 1988 page 17, Hearing before the Committee on Veterans'
Affairs United States Senate one hundredth Congress second session.
Also "Estimating the Number of Suicides Among Vietnam Veterans" (Am J
Psychiatry 147, 6 June 1990 pages 772-776)
A total of approximately 67,000 Americans.
Also on the American "side" were 223,748 South Vietnamese soldiers
killed, as well as 5,282 of other nationalities. (See
http://www.rjsmith.com/kia_tbl.html for the breakdown)
A total of approximately 300,000 so far...
Vietnamese casualties are far less specific, and they were
deliberately falsified prior to 1995, leading to some of the
confusion. According to the Agence France Presse (French Press Agency)
as reported on http://www.rjsmith.com/kia_tbl.html , "...the true
civilian casualties of the Vietnam War were 2,000,000 in the north,
and 2,000,000 in the south. Military casualties were 1.1 million
killed and 600,000 wounded in 21 years of war. These figures were
deliberately falsified during the war by the North Vietnamese
Communists to avoid demoralizing the population."
So approximately 5.1 million total Vietnamese casualites.
And a grand total of approximately 5.4 million.
Another reference coroborrating this number is at:
http://www.chss.montclair.edu/english/furr/casualty.html
Source