Ancestry Records: Your Complete Research Guide
Billions of historical records have been digitized and indexed over the past two decades. Knowing which record types exist, where to find them, and how to interpret them is the foundation of successful genealogy research.
U.S. Federal Census Records (1790–1950)
Federal census records are among the most valuable genealogical sources available for American research. Conducted every ten years since 1790, the census provides a snapshot of every household in the country at a specific moment in time. The records are subject to a 72-year privacy rule, meaning the most recently available census is from 1950, released in April 2022.
Pre-1850 censuses list only the head of household by name, with other family members grouped in age and sex categories. From 1850 onward, every household member is listed by name along with age, state or country of birth, and other details that expand with each census decade. The 1880 census adds relationship to head of household; the 1900 census adds immigration year and number of years married; the 1940 census adds highest grade of school completed.
All available censuses are freely searchable through FamilySearch. Ancestry and MyHeritage offer census records through subscription. Images of actual handwritten census pages are essential — transcriptions frequently contain errors in names, ages, and birthplaces.
Vital Records: Birth, Marriage, and Death
Birth Certificates
State-level birth registration in the U.S. began gradually from the late 1800s through the 1920s. Earlier births may be documented in church records, family bibles, midwife registers, or hospital records. Contact each state's vital records office directly for certificates less than 100 years old.
Marriage Records
Marriage licenses, bonds, and certificates are typically held by the county where the marriage occurred. They may list parents' names, ages, previous marriages, and witnesses — all valuable genealogical clues. Church marriage registers predate civil registration and are often more detailed.
Death Certificates
Death certificates typically include cause of death, place of birth, parents' names, informant, and place of burial. The informant (often a spouse or child) may not know accurate details about the deceased's birthplace or parents — always verify these details against other sources.
Immigration and Naturalization Records
For the millions of Americans with immigrant ancestors, immigration and naturalization records are among the most important genealogical sources. Ship passenger manifests, available from as early as the 1820s and increasingly detailed from 1906 onward, record the immigrant's name, age, occupation, last residence, U.S. destination, and — from 1906 — the name and address of a relative in the home country.
The National Archives holds most federal immigration records. Castle Garden and Ellis Island records (1820–1957) are searchable online through dedicated databases. After Ellis Island closed in 1954, immigration processing moved to individual ports. Naturalization records, which document the process of becoming a U.S. citizen, typically include a declaration of intent and a petition for naturalization. After September 26, 1906, copies of all naturalization papers were sent to the Immigration and Naturalization Service (INS); earlier records are held locally by the court where naturalization occurred.
Military and Land Records
Military service records, pension files, and draft registration cards document the military history of your ancestors and often contain rich biographical detail. The National Archives holds compiled military service records for the Revolutionary War through World War I; post-WWII records were severely damaged in a 1973 fire at the National Personnel Records Center, but partial records often remain.
Land records — deeds, grants, patents, and homestead applications — document property ownership from colonial times to the present. The Bureau of Land Management (BLM) General Land Office records database makes it possible to search original federal land patent records online. County courthouse deed books document land transactions and can help establish family relationships when multiple family members purchased or sold land together.
Research Methods →