In Arthur Miller's play "The Crucible," most of the main characters live in Salem. The exception lies with Parris' slave, Reverend Hale, and some of the court officials who are brought in for the Witch Trials.
That being said, only one character is not native to the Colonies: Tituba. (The Witch Trials took place in 1692 prior to the establishment of the United States of America which took place between the years of 1776 through 1789.) Tituba is Reverend Parris' slave whom he brought to the Colonies from Barbados. Reverend Parris is not a native of Salem either; he moved to Salem to take his position with the church.
Reverend Hale is a minister from a neighboring town who has had experience with witchcraft. He is known for finding a confessing witch in his own congregation and, therefore, is seen as an expert in the area.
Outside of that, as mentioned before, some of the judges who took part in the Witch Trials were not citizens of Salem. While not specifically noted in the text, there were five main judges who took part in the actual Salem Witch Trials: Governor Phips created a court which included himself, William Stoughton, John Richards, Thomas Newton, and Stephen Sewall. Other magistrates who took part in the trials were John Hathorne, Jonathan Corwin, and Bartholomew Gedney.