Where did the Jim crows laws exist?

They existed in the southern part of America which was the confederate side. (The confederate side is where they allowed slavery and the fought against the Union.) (The side which didn't allow slavery and didn't have the Jim Crow laws.)

Jim Crow laws existed mainly in the South and originated from the Black Codes that were enforced from 1865 to 1866 and from prewar segregation on railroad cars in northern cities. The laws sprouted up in the late 19th century after Reconstruction and lasted until the 1960s.