Los Alamos County, New Mexico Genealogy Guide

Los Alamos County, New Mexico (Map It) was created on March 16, 1949 from Sandoval County and Santa Fe County. The county was named for its county seat of Los Alamos, New Mexico, which itself is the Spanish name for the cottonwood tree. Learn More About State of New Mexico History

Los Alamos County is bordered by Rio Arriba County (northeast), Santa Fe County (east), Sandoval County (southwest).

Los Alamos County Cities and Towns include Los Alamos, White Rock.

Los Alamos County, New Mexico Courthouse Records

Los Alamos County, New Mexico Courthouse
Los Alamos County, NM Courthouse

The Los Alamos County Courthouse is located in Los Alamos, New Mexico. Learn More About State of New Mexico Court, Tax, Land and Probate Records.

Please contact the each clerk's department to confirm mailing address, hours, fees and other information before visiting or requesting information because contact information sometimes changes.  The Clerk's Office DOES NOT DO RESEARCH.  The documents are available to interested parties, barring confidential issues.  Most staff will assist people in finding the materials, but it is up to the individual to do the research.

The following dates indicates what vital, land, probate, and court records are in Los Alamos county. The date listed for each category of record is usually the earliest registration filed. The earliest date does not indicate that there are numerous records for that year and does not mean that all such events were actually registered.

  • Los Alamos County Clerks office has Marriage Records from 1949, Land Records from 1949 and Probate Records from 1950. The County Clerks office has land records, including deeds, mining records, surveys, and plats; marriage records; and some probate records. Also Military discharges, liens, mortgages, powers of attorney, and miscellaneous affidavits may be found there.
  • Los Alamos County 1st District Court Clerk has many responsibilities which include courts of general jurisdiction, including probate and divorce, actions, as well as jury trials.

Los Alamos County, New Mexico Census Records

  • Learn More: State of New Mexico Census Records
  • U.S. Federal Population Schedules: None
  • Territorial Population Schedules: None
  • U.S. Federal Census Mortality Schedules: None
  • Selected U.S. Federal Census Agriculture Schedules: None
  • Selected U.S. Federal Census Industry Schedules: None
  • Union Veterans Schedules: None

Los Alamos County, New Mexico Vital Records

Los Alamos County, New Mexico Resources

Los Alamos County, New Mexico External Links