MJ
Mary Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Shiawassee-County, Michigan
Our Model Tree links this Mary Jensen across the 1930 and 1940 US Censuses in Shiawassee-County, Michigan (XGBoost, ~Confirmed) — first a spouse (b.~1896), then head of a 11-person household.
Age 44
b. ~1896
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Shiawassee-County, Michigan |
| Surname | Jensen |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Owosso City |
| 1935 Residence (County) | Shiawassee |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Owosso City |
| Est. Birth Year | ~1896 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Marcella Jensen | Daughter | — | 14 | ~1926 |
| Leona Jensen | Daughter | — | 20 | ~1920 |
| Elle Jensen | Daughter | — | 12 | ~1928 |
| Niels Jensen | Head | — | 47 | ~1893 |
| Edwin Jensen | Son | — | 16 | ~1924 |
| Niels Jensen | Son | — | 6 | ~1934 |
| Kenneth Jensen | Son | — | 18 | ~1922 |
| Gary Jensen | Son | — | 2 | ~1938 |
| Frank Jensen | Son | — | 18 | ~1922 |
| Ronald Jensen | Son | — | 3 | ~1937 |
| Mary Jensen | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Shiawassee, Michigan
Spouse, age 33
Shiawassee, Michigan · implied b. ~1897 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Shiawassee-County, Michigan
Spouse, age 44
Shiawassee-County, Michigan · implied b. ~1896 — 11 household members
| Surname | Jensen |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Owosso City |
| 1935 Residence (County) | Shiawassee |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Mary Jensen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Jensen
Spouse · 1940 · age 44 · b. ~1896 · 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 — Shiawassee-County, Michigan
Open full size
1940 US Federal Census — Shiawassee-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01820-00649)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Niels Jensen | 47 | Head | Road Shipping | Illinois |
| 2 | Mary E Jensen THIS PERSON | 44 | Wife | — | Illinois |
| 3 | Leona A Jensen | 20 | Daughter | Armature Winder | Illinois |
| 4 | Frank A Jensen | 18 | Son | New | Illinois |
| 5 | Kenneth A Jensen | 18 | Son | — | Illinois |
| 6 | Edwin F Jensen | 16 | Son | — | Illinois |
| 7 | Marcella S Jensen | 14 | Daughter | — | Michigan |
| 8 | Elle C Jensen | 12 | Daughter | — | Michigan |
| 9 | Niels F Jensen | 6 | Son | — | Michigan |
| 10 | Ronald J Jensen | 3 | Son | — | Michigan |
| 11 | Gary P Jensen | 2 | Son | — | Michigan |
| 12 | Lawrence W Doran | 57 | Head | Assembler | Michigan |
| 13 | Emma E Doran | 59 | Wife | — | Michigan |
| 14 | Charles A Dietrich | 31 | Head | Freight Handler | Michigan |
| 15 | Elizabeth Dietrich | 24 | Wife | Proprietor | Michigan |
| 16 | Leonard J Harvey | 53 | Head | Fireman | Michigan |
| 17 | Anna A Harvey | 39 | Wife | — | Michigan |
| 18 | Beryl E Harvey | 23 | Daughter | General Office Work | Michigan |
| 19 | Oliver R Guernsey | 55 | Head | Carpenter | Ohio |
| 20 | Katherine Guernsey | 58 | Wife | — | New York |
| 21 | Leo Ream | 47 | Son-in-law | Meat Cutter | Michigan |
| 22 | Henrietta Ream | 28 | Daughter | Machine Operator | Michigan |
| 23 | Muriel F Ream | 5 | Daughter | — | Michigan |
| 24 | Patricia A Ream | 2 | Daughter | — | Michigan |
| 25 | Frank Harvey | 59 | Head | Fireman | Michigan |
| 26 | Bertha P Harvey | 54 | Wife | — | Michigan |
| 27 | Howard F Castle | 8 | Grandson | — | Michigan |
| 28 | George H Castle | 7 | Grandson | — | Michigan |
| 29 | Frank Mckeller | 49 | Head | Brakeman | Michigan |
| 30 | Leota E Mckeller | 43 | Wife | — | Michigan |
| 31 | Clinton R Mckeller | 22 | Son | Inspector | Michigan |
| 32 | Elmer Van Wormer | 22 | Lodger | Machinist | Michigan |
| 33 | David Perrine | 22 | Lodger | Spray Painter | Michigan |
| 34 | Edward N Holford | 70 | Head | Carpenter | Michigan |
| 35 | Louisa M Holford | 57 | Wife | — | Michigan |
| 36 | Beulah B Holford | 36 | Daughter | Bookkeeper | Michigan |
| 37 | Garnett R Holford | 23 | Son | No Trade | Michigan |
| 38 | Bonita W Holford | 23 | Daughter | — | Michigan |
| 39 | Vance W Holford | 25 | Head | Packer | Michigan |
| 40 | Hazel E Holford | 23 | Wife | Machine Operator | Minnesota |
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)