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Joan Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Michigan
Our Model Tree links this Joan Smith across the 1930 and 1940 US Censuses in St.-Clair-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 5-person household.
Age 12
b. ~1928
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Michigan |
| Surname | Smith |
| Given Name | Joan |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | St. Clair City |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Highest Grade | No 6 |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | St Clair City |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joan | Age | Birth yr |
|---|---|---|---|---|
| Joan Smith | Daughter | — | 12 | ~1928 |
| Roger Smith | Son | — | 1 | ~1939 |
| Agnes Smith | Spouse | — | 28 | ~1912 |
| George Smith | Head | — | 30 | ~1910 |
| James Smith | Son | — | 6 | ~1934 |
Census Appearances
1930
St Clair, …
Daughter, age 3
St Clair, Michigan · implied b. ~1927 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Jean |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Indiana |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
St.-Clair-County, Michigan
Daughter, age 12
St.-Clair-County, Michigan · implied b. ~1928 — 5 household members
| Surname | Smith |
| Given Name | Joan |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | St. Clair City |
| 1935 Residence (County) | St. Clair |
| Highest Grade | No 6 |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 · Michigan
★ You are viewing this record
Sibling
Roger Smith
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Smith
Sibling · 1940 · age 6
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 — St.-Clair-County, Michigan
Open full size
1940 US Federal Census — St.-Clair-County, Michigan
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01816-00925)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harry Foss | 53 | Head | Own Business | Michigan |
| 2 | Gladys Foss | 43 | Wife | Grocery Store | Michigan |
| 3 | Merlin Foss | 19 | Son | Grocery Store | Michigan |
| 4 | Marjorie Foss | 14 | Daughter | — | Michigan |
| 5 | Lenora Fulmer | 68 | Lodger | — | Michigan |
| 6 | Anna Fulmer | 62 | Lodger | — | Michigan |
| 7 | Robert Cleghorn | 39 | Head | Chrysler Corp | Canada |
| 8 | Agnes Cleghorn | 35 | Wife | — | Michigan |
| 9 | John Cleghorn | 15 | Son | — | Michigan |
| 10 | Charles Kellum | 28 | Lodger | Chrysler Corp | Michigan |
| 11 | George Mrs Riley | 70 | Head | — | Michigan |
| 12 | Gerald Short | 46 | Head | Detroit Edison | Canada |
| 13 | Ralph Concelia | 25 | Head | Dairy Bar | Michigan |
| 14 | Florence Concelia | 24 | Wife | — | Michigan |
| 15 | Karen Concelia | 1 | Daughter | — | Michigan |
| 16 | William Bedford | 25 | Lodger | Public School | Michigan |
| 17 | Henry Pridmore | 41 | Head | Government | Michigan |
| 18 | Agnes Pridmore | 31 | Wife | — | Michigan |
| 19 | Roland Pridmore | 2 | Son | — | Michigan |
| 20 | John Pridmore | 0 | Son | — | Michigan |
| 21 | Martin Baldwin | 70 | Head | Own Shop | New York |
| 22 | Edna Baldwin | 64 | Wife | — | New York |
| 23 | Helen Baldwin | 41 | Daughter | Community Hospital | Michigan |
| 24 | Florence Baldwin | 62 | Sister | — | Michigan |
| 26 | Joan Fredericks | 11 | Daughter | — | Michigan |
| 27 | Ivan Crawford | 52 | Head | Salt Company | Michigan |
| 28 | Johanna Crawford | 50 | Wife | — | Michigan |
| 29 | Chester Crawford | 31 | Son | Detroit Free Press | Michigan |
| 30 | Ben Muehlman | 51 | Head | Auto-Lite Factory | Michigan |
| 31 | Ruth Muehlman | 22 | Wife | Gt. Lakes Freight | Michigan |
| 32 | George Smith | 30 | Head | Gt. Lakes Freight | Indiana |
| 33 | Agnes Smith | 28 | Wife | — | Michigan |
| 34 | Joan Smith THIS PERSON | 12 | Daughter | — | Michigan |
| 35 | James Smith | 6 | Son | — | Michigan |
| 36 | Roger Smith | 1 | Son | — | Michigan |
| 37 | Grace Mrs Hiller | 53 | Head | — | Michigan |
| 38 | Blanchard Culand | 34 | Head | Salt Company | Michigan |
| 39 | Donna Culand | 24 | Wife | — | Michigan |
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)