JK
John Kirk — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sanilac-County, Michigan
Our Model Tree links this John Kirk across the 1920, 1930 and 1940 US Censuses in Sanilac-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 4-person household.
Age 59
b. ~1881
Male
Head
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sanilac-County, Michigan |
| Surname | Kirk |
| Given Name | John R. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Marlette |
| 1935 Residence (County) | Sanilac |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Farmer |
| Township / Ward | Marlette |
| Est. Birth Year | ~1881 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Kirk | Head | — | 59 | ~1881 |
| Jean Kirk | Daughter | — | 17 | ~1923 |
| Kathryn Kirk | Daughter | — | 14 | ~1926 |
| Margaret Kirk | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Sanilac, Michigan
Head, age 39
Sanilac, Michigan · implied b. ~1881 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirk |
| Given Name | John R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Michigan |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Sanilac, Michigan
Head, age 49
Sanilac, Michigan · implied b. ~1881 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirk |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 28 |
| Father's Birthplace | England |
| Mother's Birthplace | Canada-English |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Veteran | No |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Sanilac-County, Michigan
Head, age 59
Sanilac-County, Michigan · implied b. ~1881 — 4 household members
| Surname | Kirk |
| Given Name | John R. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Marlette |
| 1935 Residence (County) | Sanilac |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| 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 John Kirk across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Kirk
Head · 1940 · age 59 · b. ~1881 · Michigan
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sanilac-County, Michigan
Open full size
1940 US Federal Census — Sanilac-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01818-00591)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ivan Thoist | Thoest | 11 | son | — | Michigan |
| 42 | Lelia Thoist | Thoest | 10 | daughter | — | Michigan |
| 43 | Alma Thoist | Thoest | 8 | daughter | — | Michigan |
| 44 | Lloyd Thoist | Thoest | 7 | son | — | Michigan |
| 45 | Beverly Thoist | Thoest | 5 | daughter | — | Michigan |
| 46 | Shirley Thoist | Thoest | 2 | daughter | — | Michigan |
| 47 | Sharron Thoist | Thoest | 1 | daughter | — | Michigan |
| 48 | William Cochrane | 68 | head | Farmer | Canada |
| 49 | Almeda Cochrane | 64 | wife | — | Canada |
| 50 | Guthrie Brown | 41 | head | Farmer | Michigan |
| 51 | Lucile Brown | 35 | wife | — | Michigan |
| 52 | Alice Brown | 13 | daughter | — | Michigan |
| 53 | Norma Jean Brown | 9 | daughter | — | Michigan |
| 54 | Wesley Northrup | 62 | lodger | Farmer | Michigan |
| 55 | John R. Kirk THIS PERSON | 59 | head | Farmer | Michigan |
| 56 | Margaret B. Kirk | 52 | wife | — | Canada |
| 57 | Jean Kirk | 17 | daughter | Clerk | Michigan |
| 58 | Kathryn Kirk | 14 | daughter | — | Michigan |
| 59 | Frank Hunyadi | 52 | head | Farmer | Hungary |
| 60 | Mary Hunyadi | 49 | wife | — | Hungary |
| 61 | William Hunyadi | 3 | son | — | Michigan |
| 62 | Russell Forbes | 32 | head | Farmer | Michigan |
| 63 | Loda Forbes | 32 | wife | — | Michigan |
| 64 | Donald Forbes | 5 | son | — | Michigan |
| 65 | George A. Hiscock | 48 | head | Farmer | Michigan |
| 66 | Ethel Hiscock | 44 | wife | — | Michigan |
| 67 | John Hiscock | 25 | son | Farmer | Michigan |
| 68 | Florence Hiscock | 16 | daughter | — | Michigan |
| 69 | Royal Hiscock | 14 | son | — | Michigan |
| 70 | Dale Hiscock | 9 | son | — | Michigan |
| 71 | George Hiscock | 5 | son | — | Michigan |
| 72 | Harold Hiscock | 1 | son | — | Michigan |
| 73 | Frank Camas | 65 | boarder | Farm Labor | Hungary |
| 74 | Frederick Helwemer | 41 | head | Farmer | Michigan |
| 75 | Walter Helwemer | 27 | brother | Farmer | Michigan |
| 76 | Emma Helwemer | 66 | mother | — | Michigan |
| 77 | J. De Herman | 61 | head | Farmer | Michigan |
| 78 | Charles De Herman | 63 | brother | Farmer | Michigan |
| 79 | Bernice De Herman | 25 | nephew | Farmer | Michigan |
| 80 | Ernest Dunsford | 66 | head | Farmer | Canada |
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)