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Joan Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Oliver-County, North Dakota
Our Model Tree links this Joan Smith across the 1930 and 1940 US Censuses in Oliver-County, North Dakota (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Female
Daughter
Born: North Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Oliver-County, North Dakota |
| Surname | Smith |
| Given Name | Joan |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | 144-83 |
| 1935 Residence (County) | Oliver |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Township / Ward | 14483 |
| Est. Birth Year | ~1928 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joan | Age | Birth yr |
|---|---|---|---|---|
| Thomas Smith | Son | — | 19 | ~1921 |
| Norman Smith | Son | — | 3 | ~1937 |
| Ruth Smith | Daughter | — | 17 | ~1923 |
| Ben Smith | Son | — | 8 | ~1932 |
| Joan Smith | Daughter | — | 12 | ~1928 |
| Lula Smith | Head | — | 43 | ~1897 |
| Nellie Smith | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Oliver, North …
Daughter, age 2
Oliver, North Dakota · implied b. ~1928 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Joan E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Nebraska |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Oliver-County, North …
Daughter, age 12
Oliver-County, North Dakota · implied b. ~1928 — 7 household members
| Surname | Smith |
| Given Name | Joan |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | 144-83 |
| 1935 Residence (County) | Oliver |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Joan Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joan Smith
Daughter · 1940 · age 12 · b. ~1928 · North Dakota
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Sibling
Nellie Smith
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Smith
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Norman Smith
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Smith
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ben Smith
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Oliver-County, North Dakota
Open full size
1940 US Federal Census — Oliver-County, North Dakota
Page Contents
14 people indexed on this census page (nara:1940:m-t0627-03008-00892)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lula Smith | 43 | Head | — | Nebraska |
| 2 | Thomas Smith | 19 | son | Farmer | North Dakota |
| 3 | Ruth Smith | 17 | daughter | — | North Dakota |
| 4 | Joan Smith THIS PERSON | 12 | daughter | — | North Dakota |
| 5 | Ben Smith | 8 | son | — | North Dakota |
| 6 | Nellie Smith | 5 | daughter | — | North Dakota |
| 7 | Norman Smith | 3 | son | — | North Dakota |
| 8 | Ed O Youngquist | 51 | Head | Farmer | North Dakota |
| 9 | Peter Relser|Reiser | 80 | Head | Sawing | Germany |
| 10 | Ross O Cullen | 32 | Head | Farmer | North Dakota |
| 11 | Lorraine Cullen | 29 | wife | — | Iowa |
| 12 | Norma Jean Cullen | 8 | daughter | — | North Dakota |
| 13 | Charles Cullen | 5 | son | — | North Dakota |
| 14 | Clair Cullen | 28 | brother | Farmer | North Dakota |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)