I'm which region of the north were most free black males permitted to vote?

None of the black men won the right to vote until after the civil war.

Explanation:

It was not until the end of civil war that black men were allowed to vote and the 15th amendment brought this to the fore.

After the death of Abraham Lincoln the new phase brought on by Andrew Johnson was very partial to the south where they were allowed to have black codes and so they did not give the black population their right to vote there

In the north, it was permissible for the black property owners to vote as soon as the war was over however.