Church Records
Fortunately for all of us doing research on our Franco-American, French-Canadian and Acadian ancestors, the church of our heritage, the Roman Catholic Church, required parishes to keep vital records from as early as 1539 in France and 1621 in Canada. Published Canadian parish records are called Repertoires and there are hundreds of them. Most of these published repertoires provide marriage records only, but the information in these records includes the names of all parties involved in the wedding, bride and groom, parents and witnesses, and maiden names of the women are provided. Some of these books, including this many volume set, Repertoire des Actes de Bapteme, Mariage, Sepulture et des Recensements du Quebec Ancien, includes baptism and deaths as well .
Here are some other publications of this type that are available in local libraries:
Dictionnaire genealogique des familles canadiennes depuis la fondation de la colonie jusqu'a nos jours by Tanguay.
Dictionnaire généalogique des familles du Québec by Rene Jette
Dictionnaire national des Canadiens-français, 1608-1760
Répertoire des mariages au Nord-Ouest du Nouveau-Brunswick, Canada
Répertoire des mariages (Catholiques) du comté Mégantic (20 paroisses) 1845 à 1925
Mariages de Cap Saint-Ignace, 1669-1973
Répertoire des mariages de Louiseville (Paroisse Saint Antoine de la Rivière du Loup)

This is just a sample of the publications available. The Maine State Library has a large collection of these volumes.
Church records for many Maine communities have also been published. Robert Chenard and Youville Labonte are both contributors to this genre as are several genealogical and historical societies and churches.

If you don't find a published transcription of church records from the area in which your ancestors lived, you can contact the church or you may have to visit the church or diocese to peruse the records in person. Here is a list of Catholic Churches in Maine and a directory of diocese in Canada which includes history and contact information.

To find out if there is a book available for the area you are researching, search URSUS for the subject Marriage records - Maine or Registers of births, etc - Maine to find what is available.

Interlibrary Loan services are also available to you if you don't find what
you are looking for at your local library. MaineCat is a library catalog which
includes the State Library, the University system, Bowdoin, Bates and Colby, and
many of the public and community college libraries in the state. You can
request these items at the library or from home if you have an internet
connection. If you don't find what you are looking for in MaineCat, there
is still a chance that the staff at you local library can get the book for you,
so don't give up. It can be frustrating because many libraries don't
circulate local history and genealogy materials, but every once in a while you
get just what you needed and saved yourself a trip.