1870 Census Records: How to Search Free (First Post-Slavery Census)
The 1870 census is free to search on FamilySearch.org, fully indexed with images of every page. Taken as of June 1, 1870, it's one of the most important documents in American history: the first census to record formerly enslaved Americans by name. For millions of Black families, 1870 is the earliest federal record where their ancestors appear as named individuals — the anchor point that all earlier research works backward from.
This guide covers how to search 1870 free, what its columns record, why the census has a serious undercount problem in the South, and the strategies — surname flexibility, location logic, Freedmen's Bureau records — that make it work. Reconstructing families across the 1870 divide involves careful relationship reasoning, and the free family relationship calculator on our homepage helps you name every connection precisely as the tree fills in.
Which record should I search? Tap your 1870-era research problem for the free starting point.
Tap a situation above to see where to search.
Map how you're related to them →Why 1870 is a landmark census
The ninth census was the first taken after the Civil War and the ratification of the 13th Amendment. Its significance is simple and profound: roughly four million Americans who had been enslaved — recorded in 1860 only as anonymous age-and-sex entries on slave schedules — appear in 1870 by name, with ages, birthplaces, occupations, and households.
For African American genealogy, this makes 1870 the foundational census. The standard method is to document the family thoroughly in 1870 — every name, age, birthplace, and neighbor — and then push backward into slavery-era records: Freedmen's Bureau papers, Freedman's Bank applications, wills and probate files of slaveholding families, and the 1850/1860 slave schedules. Our African American genealogy guide walks that path step by step.
1870 matters for every line, though: it's the census that catches postwar migration, the first wave of industrial city growth, and — for immigrants — new columns on foreign-born parents and male citizenship.
How to search the 1870 census free
- Open the 1870 collection on FamilySearch.org (free account, no payment).
- Search the name with a ±5 year age range and the state only.
- Open every plausible image — the index is a finding aid, the page is the evidence.
- Read the whole neighborhood, not just the household. In 1870 especially, extended families lived in adjacent dwellings, and in the rural South, freedpeople often still lived near the former plantation — making the neighbors a clue to the slavery-era community.
- Note dwelling/family numbers and the post office name at the page top; both help you relocate the family in county records.
If a name search fails, try: given names only within a county (powerful for distinctive first names), phonetic surname variants, or a known neighbor as the doorway. General tactics live in our census search guide.
What the 1870 census asked
| Column | What it tells you |
|---|---|
| Name | Every person, including all formerly enslaved Americans |
| Age | As of June 1, 1870 — often estimated, sometimes badly |
| Sex, color | The era's categories: white, black, mulatto, Chinese, Indian |
| Occupation | For everyone, including children ("at home," "farm laborer") |
| Value of real / personal estate | Two columns — land ownership five years after the war is a story in itself |
| Birthplace | State or country |
| Father / mother of foreign birth | Two checkbox columns — the first census to flag immigrant parentage |
| Born / married within the year | Month given — points at 1869–70 vital events |
| Attended school, cannot read, cannot write | Education snapshot |
| Male citizens 21+ | Citizenship flags, useful for naturalization timing |
Note what's still missing: no relationship-to-head column (that arrives in 1880) and no parents' birthplaces by name. An 1870 household is a list of co-residents; the structure — wife? sister? mother-in-law? — must be inferred and then proven.
The undercount problem (and the second enumerations)
Be aware of 1870's known weaknesses:
- The postwar South was seriously undercounted. Reconstruction-era logistics, displaced families, and hostility to federal agents meant many Southern households — Black and white — were simply missed. If a family is absent, it doesn't mean they weren't there.
- Some cities got a do-over. Complaints about urban undercounts led to second enumerations in several cities, including New York, Philadelphia, and Indianapolis, taken later in 1870–71. If your family lived in one of these, check both counts — details often differ between them.
- Ages and birthplaces are soft. For freedpeople, birth dates were often unrecorded during slavery; 1870 ages can be off by five to ten years. Compare against 1880 and 1900 (which asked birth month/year) before settling on one.
Gap-fillers when 1870 fails: state censuses (1875 in several states), county tax lists, voter registrations (including the important 1867 registrations in the former Confederacy), and city directories.
Surnames after emancipation
A special note for post-slavery research: surnames in 1870 were newly chosen and not always stable. Some families took a former slaveholder's surname; many deliberately did not, choosing the name of an earlier owner, a respected figure, or a name of their own. Some households appear under one surname in 1870 and a different one in 1880.
Practical implications:
- Search by given names within a county when the surname fails — first names were the stable identifiers.
- Don't assume the 1870 surname points to the last slaveholder — it may point to an earlier one, or none.
- Track the whole cluster: siblings sometimes chose different surnames, so a brother's line may carry a different name to this day. Working out that two present-day families descend from 1870 siblings makes them cousins — and the free relationship calculator tells you exactly which kind, based on how many generations each side has added.
Worked example: reading an 1870 Southern household
Put the techniques together. Suppose 1870 shows, in a rural Georgia district: Green Freeman, 48, farm laborer, born Georgia; Hannah, 45; and six younger people aged 3 to 26, all surname Freeman, plus "Rachel Freeman, 70" at the end.
- Structure is inferred, not stated. Green and Hannah are plausibly a couple, the middle six plausibly children — but 26-year-old Amanda could be a daughter, a daughter-in-law, or Green's much-younger sister. Note all three hypotheses.
- Rachel, 70, is the prize. A woman of her age in this household was born around 1800 and is very likely Green's or Hannah's mother — a generation born deep in slavery, named in a federal record. Prioritize her in every later search (she may appear in an 1880 household with a stated relationship like "mother," retroactively proving the link).
- The neighbors tell the rest. If adjacent households include white farm families whose surname matches records of local slaveholders, their probate files, deeds, and estate inventories become the next research targets for the pre-1865 story.
- Then bind it with 1880. When 1880's relationship column shows Rachel as "mother" in a child's household, the 1870 inference becomes documented fact — and every descendant relationship (who is whose half-sibling, which modern families are second cousins) can be charted confidently with the free calculator.
One census page, read slowly, produces three generations and a research plan.
FAQ
Where can I search the 1870 census for free?
FamilySearch.org has the complete 1870 census indexed with page images, free with a free account. Library editions of commercial sites offer alternative indexes of the same pages free in many public libraries.
Why is the 1870 census called the first post-slavery census?
It was the first census taken after emancipation, and therefore the first to record roughly four million formerly enslaved Americans by name — people listed only as anonymous tally entries on the 1850 and 1860 slave schedules.
Does the 1870 census say how household members are related?
No. Relationship to the head of household wasn't asked until 1880. Household order hints at structure, but relationships should be proven with marriage records, probate files, and the 1880 census.
Why can't I find my Southern family in 1870?
The 1870 count is known to have missed many people in the Reconstruction-era South. Try given-name searches, neighbors, state censuses, county tax lists, and 1867 voter registrations before concluding the family was elsewhere.
What are Freedmen's Bureau and Freedman's Bank records?
Federal records from 1865–1874 documenting formerly enslaved people: labor contracts, legalized marriages, rations, hospital rolls (Bureau), and bank account applications that often name parents, siblings, and children (Bank). Both are free to search on FamilySearch and pair naturally with the 1870 census.
My city had two 1870 enumerations — which is right?
Neither automatically; they're two independent counts of the same city months apart. Compare both — a family missed or mangled in one is often clear in the other.
Build on the 1870 anchor
Whatever line you're tracing, 1870 is a census worth mastering — and for descendants of enslaved Americans, it's the great anchor record of the whole pursuit. Document the household free on FamilySearch, mine the neighbors, bridge forward to 1880 for stated relationships and backward through Bureau and Bank records. And as the reconstructed family widens into siblings' lines and their modern descendants, the free CousinChart relationship calculator will name every cousin connection exactly.
