This page sums up the deaths that has occured in the show. This is how it is shown:
Name of victim
Photo of victim Cause of death Name of killer, other person or people connected to the death.
Eli Thompson, Nucky Thompson
Shot in the back of the head.
Simon Killed by Nelson Van Alden but shot by Jimmy Darmody
Died of blood loss.
Shot herself in the head.
N/A Shot in the back of the head
N/A Shot in the chest. Sixtus D'Alessio (Accidental)
Shot in the head. Jimmy Darmody
N/A Strangled. Chalky White
Poisoned. Louianne Pratt
Eric Sebso Drowned. Nelson Van Alden
N/A Shot in the face. Lucky Luciano