How many people died in the September 11 attacks?

2,995.

A total of 2,995 deaths were tallied from the deadly terrorist attacks in the United States on September 11, 2001. This is according to the online encyclopedia Wikipedia. Of these deaths, 2,976 were civilian casualties while 19 are hijacker deaths. The greatest civilian casualty count occurred in the World Trade Center with 2,605, followed by 125 in the Pentagon. The rest were casualties from the hijacked commercial airliners American 11 and 77 and United 93 and 175.