New Mexico County records vary widely from county to county in both quality and quantity. Some have been carefully preserved while others have been much abused and neglected. Some New Mexico records have simply disappeared. For genealogists doing research in New Mexico there is no effective replace for an on-site search of county courthouse records. For Definitions of all court terms see the Genealogy Encyclopedia.
New Mexico is divided into 33 counties. There were originally nine counties formed in 1852. Santa Ana County, New Mexico Territory, one of the nine original counties, was annexed in 1876 to Bernalillo County, New Mexico.
The county seat’s county clerk’s office retains some probate records, as well as plats, surveys, mining records, deeds, land records, and records pertaining to marriages. They also have files containing mortgages, liens, powers of attorney, military discharges and other documents and affidavits. The district clerk’s office holds records pertaining to probate matters.
The New Mexico State Records Center and Archives has records on file that predate formal county organizations and certain counties may also have similar records on file from Mexican and Territorial times. See also a list of links to county and county seat government run websites.