Lyman Platt has a series of publications that more or less track the development of ecclesiastical and political divisions in Mexico:

http://www.infowest.com/personal/l/lplatt/platt.html

Vol. 2 Mexico, General Guide:Political Divisions.$14.95. Soft cover, taped binding, 8½ x 11.

Lyman Platt has a series of publications that more or less track the development of ecclesiastical and political divisions in Mexico:

http://www.infowest.com/personal/l/lplatt/platt.html

Vol. 2 Mexico, General Guide:Political Divisions.$14.95. Soft cover, taped binding, 8½ x 11.

This 85-page volume includes a detailed historical analysis of the development of political boundaries in modern Mexico, and those areas of the United States that used to belong to the Viceroyalty of Mexico. All known civil jurisdictions are identified from the first colonial divisions up until the organization of municipalities in the independence era, and then only the development of the various states is discussed. A complete index of these divisions at the end of the book allows the researcher to trace where ancestral homes might have been located based on this development. This understanding would permit the researcher to find records important to their genealogy.

Vol. 3 Mexico, General Guide: Ecclesiastical Divisions $34.95. Soft cover, taped binding, 8½ x 11. 256 pages, revised.

This book, available in both English and Spanish, includes a brief ecclesiastical history of Mexico, including a study of diocesan and archdiocesan development for all of Mexico up through 1912. The major portion of the book treats individual parishes for all of the ancient Viceroyalty of Mexico, including Alta California, Arizona, Nuevo Mexico, and Texas. The Federal District is divided by its various delegations and includes a comprehensive, first-ever analysis of the parishes of Mexico City proper.