Continuity: During the first quasi love scene between Amsterdam and Jenny (after the dance) there is a shot where they begin to kiss, and they are at about the same height, right next to each other. In the next shot, Amsterdam pulls away, and you can see that she was laying back, and he was leaning over her, kissing - a completely different position.

Other: In the sequence where the "Natives" celebrate the 16th Anniversary of their victory over the "Dead Rabbits," we can see that the year is 1863 while the battle shown in the beginning of the movie happens in 1846. Shouldn't they have been celebrating 17th anniversary instead of a 16th?

Continuity: In the very beginning of the movie priest Vallon is shaving. The reflection in the mirror shows a wispy, short mustache, but when we see Vallon's face as he speaks to his son his mustache is thick and twisted.

Continuity: During the funeral, when they are transporting the coffin in the street, there's a dog besides Bill the Butcher. He keeps changing place.

Continuity: When Amsterdam jumps at the killer to protect Bill, the way he takes off to the right and the way he grabs the hand with the gun coming from the left side don't fit.

Factual error: Before Jenny and Amsterdam make love she reveals a scar that, according to her, was the result of a baby taken out. The position of the scar would have been good for removing the left lung, but a bit far away from the uterus.

Continuity: When Amsterdam comes to Bill's place for the first time there is a little altar with priest Vallon's picture. It has an inscription saying 'In Memory of Priest Vallon, 1846'. When he comes the second time and has his fist fight with McGloin the picture falls on the ground. When Bill put's it back on its place the inscription isn't there.

Revealing: In the middle of the battle of Five Points Monk swings his club horizontally at shoulder level, but the swing ends on a victim's ankle. When the bones break it's very obvious that it's a prop.

Continuity: When we see young Amsterdam run off with the knife that was used to stab Priest Vallon, he puts the knife into a little cubbie hole in the floor. 16 years go by and we see Amsterdam as an adult return to the same cubbie whole, but this time when he pulls out the knife it is wrapped in some type of a cloth.

Continuity: When Bill gets shot, he is standing above the man who shot him and depending on the camera angle, the blood spot on his left arm changes size and location. Happens about 4 times during the scene.

Revealing: When the four scapegoats are hanged you see two shots of people watching them fall, following them with their eyes on their way down: first the wife of one of the condemned scapegoats, then Bill's followers. The funny thing is that in the second group, only Amsterdam seems to look at the executed, while McGloin and the others keep staring into empty space where the hanged had been before they fell.

Continuity: When Vallon lies on the ground after Vallon has stabbed him he is tightly surrounded by people. When you see his son holding on to his dying father you should see other people's feet, but there aren't any. Also from the lighting of the scene you can tell that these shots were taken with no crowd around.

Continuity: In the scene where Jenny rubs her fingers over the old scars on Amsterdam's chest, you can see light under the tips of the scars as if they peeled up.

Continuity: In the opening scene, priest Vallon cuts the right side of his face with the straight razor. Later on, when Bill and Vallon are belittling each other before the brawl, there is a scar on the left side of Vallon's face.

Revealing: In the Five Points battle scene, in the beginning of the movie, look at Bill the Butcher's blades when he walks through the crowd towards Priest Vallon. There is no sign of blood on them, even after he stabs a lot of people.

Revealing: When Bill gets shot at the theater blood gushes in quantities that could only come from a main artery. His obvious fitness in the following sequences speaks agains it, though.

Continuity: Before the Ghoul Gang leaves the Portuguese ship, Amsterdam throws the captain's body into the boat. It lands more or less under the seat, but in the next shot the body is placed right at the bow.

Revealing: When Amsterdam meets Bill for the first time as an adult Bill is playing Whist. Because he is pissed with a guy whose bet isn't high enough he pulls his knife and pins the man's hand to the table. When he does so the hand isn't anywhere near the point where the knife goes in, and when Bill pulls out the knife again you see that it was stuck in the table and the man's hand was resting next to it.

Continuity: In the scene where the future Ghoul Gang shares the booty, Amsterdam provokes the leader who is sitting down while the others are standing behind the table. The guy jumps at him, while the others stay where they are, but before he reaches Amsterdam the others guys separate them, emerging mysteriously from the sides.

Continuity: At the end of the Five Points battle, when the defeat of priest Vallon is announced, there are some shots of his shocked followers. In one you see Monk with a pretty clean face, but when the camera closes up on his face it's full of measles-looking blood stains.