The remaining 34 dead were soldiers, police officers, or, in a few cases, members of the security service Shin Bet.
Earlier, Israeli data had set the number of fatalities at the festival to 370.
The new findings from the massacre on October 7, 2023, which led to Israel's war against Hamas in Gaza, were presented on Thursday to the relatives of the victims and survivors.
Around 3,400 people attended the festival in Reim, just half a mile from the border with Gaza, that day. The police ordered the festival to be closed at 06:35 in the morning, six minutes after Hamas fired thousands of rockets from the Gaza Strip towards southern Israel.
Most festival-goers managed to flee before the first wave of "110 terrorists" arrived at the site at 08:20. Hamas had not originally planned to attack the festival but took a wrong turn on the way to the city of Netivot in the north, where they never arrived, according to the military's report.
The first Israeli soldiers in the rescue operation arrived at the festival only at 11:20, the report shows.
We learned nothing new. We already knew that they failed, comments a relative who wishes to remain anonymous.
In total, 1,218 people were killed in Hamas' attacks on October 7, and 251 were taken hostage.