Check out FamilySearch’s New Mexico Online Genealogy Records for comprehensive list of links, both free and fee-based.
Explore these free online databases for New Mexico:
New Mexico, Births and Christenings, 1726-1918
New Mexico, Civil War Service Records of Union Soldiers, 1861-1865
New Mexico, County Death Records, 1907-1952
New Mexico, County Marriages, 1885-1954
New Mexico, Deaths and Burials, 1788-1798; 1838-1955
New Mexico, Marriages, 1751-1918
Western States Marriage Records Index
New Mexico Roots, ltd. (pre-nuptial investigations, 1678-1869)
New Mexico Online Historical Newspapers
New Mexico Newspapers Database
New Mexico “orphaned” vital records
New Mexico Digital Collections
Spanish Enlistment Papers, 1770-1816
Locating Catholic Church Records in NM and Southern CO
The Great New Mexico Pedigree Database Project
Inventory of the Land Grant Collections, 1700-1993 at NMSRCA
New Mexico, U.S. Tax Assessment Lists, 1862-1874
History of Arizona and New Mexico, 1530-1888, by Bancroft
History of New Mexico, Its Resources and People, vol 1
History of New Mexico, Its Resources and People, vol 2
New Mexico Death Index Project, 1889-1940
Online digital newspaper collections listed in Genealogy’s Star:
On Granny's Trail 