How many American soldiers died in WW2

WW2 started in 1939. The U.S. joined in 1941. When the war ended in 1945, roughly 416,800 American military personnel had lost their lives.

dont listen to this they dont know what there talkin about

^ya, coming from someone who doesn't know the proper use of "there"

As is typical, there are multiple amounts cited. According to the Oxford companion to Military History, casualties were as follows:

Killed in action: 291,557

other deaths: 113,842

total dead: 405,399

Total wounded: 670,846

Total dead or wounded: 1,076,245

Missing: 30,314

Note that the Washington World war two memorial indicates 404,800 dead, so there are small discrepancies between sources.
416,877 members of the US military were killed or missing during WWII.

Military dead or missing:

Army 318,274
[United States Army Air Forces (88,119 number included in Army)]
Navy 62,614
Marine Corps 24,551,
Coast Guard 1,917, and
United States Merchant Marine 9,521.
US Military casualties were about 408,200 in the Second World War. This was soldiers, sailors. marines, airmen, & coast guard.
in World War II, 416,800 American Troops where killed in Action