Prior to 1892, towns were not required to file records of birth, marriage and death. Some towns have records before 1892, but these are not a complete recording of events.
Unsure where the event took place? Begin by contacting the state, they maintain copies of records from every town in Maine.
Be sure to check family bibles, city directories, obituaries, old maps, old photographs, town history books and old newspapers for information.
State Archives keeps a list of professional genealogists who will provide research for a fee.