MJ
Mary Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clinton-County, Iowa
Our Model Tree links this Mary Jensen across the 1930 and 1940 US Censuses in Clinton-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 9-person household.
Age 50
b. ~1890
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Clinton-County, Iowa |
| Surname | Jensen |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Clinton |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Camanche Twp |
| Est. Birth Year | ~1890 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Leona Jensen | Daughter | — | 23 | ~1917 |
| Nancy Jensen | Daughter | — | 12 | ~1928 |
| Inez Jensen | Daughter | — | 20 | ~1920 |
| Adolph Jensen | Head | — | 51 | ~1889 |
| Donald Jensen | Son | — | 26 | ~1914 |
| Ronald Jensen | Son | — | 25 | ~1915 |
| Leroy Jensen | Son | — | 25 | ~1915 |
| Vernon Jensen | Son | — | 21 | ~1919 |
| Mary Jensen | Spouse | — | 50 | ~1890 |
Census Appearances
1930
Clinton, Iowa
Other, age 40
Clinton, Iowa · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 19 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Clinton-County, Iowa
Spouse, age 50
Clinton-County, Iowa · implied b. ~1890 — 9 household members
| Surname | Jensen |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Clinton |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 50 · b. ~1890 · Iowa
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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 — Clinton-County, Iowa
Open full size
1940 US Federal Census — Clinton-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01150-00087)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lloyd Voorhees | 40 | Head | Farmer | Iowa |
| 2 | Edith Voorhees | 39 | Wife | — | Iowa |
| 3 | John Voorhees | 14 | Son | — | Iowa |
| 4 | Harold Voorhees | 8 | Son | — | Iowa |
| 5 | Mary Voorhees | 2 | Daughter | — | Iowa |
| 6 | George Goddard | 19 | Hired man | Hired Man | Iowa |
| 7 | Raymond J. Early | 41 | Head | Farmer | Illinois |
| 8 | Lydia Early | 41 | Wife | — | Iowa |
| 9 | Archie F. Evans | 44 | Head | Farmer | Iowa |
| 10 | Blanche Evans | 44 | Wife | — | Illinois |
| 11 | Jane Evans | 16 | Daughter | — | Iowa |
| 12 | Jas. M. Booth | 47 | Head | Farmer | Virginia |
| 13 | Algy Booth | 47 | Wife | — | Iowa |
| 14 | Esta Mae Booth | 17 | Daughter | — | Iowa |
| 15 | Emil Henricksen | 51 | Head | Farmer | Iowa |
| 16 | Anna Henricksen | 43 | Wife | — | Iowa |
| 17 | Dorothy Henricksen | 22 | Daughter | Teacher | Iowa |
| 18 | William Hall | 70 | Hired man | Hired Man | Illinois |
| 19 | Adolph Jensen | 51 | Head | Farmer | Iowa |
| 20 | Mary Jensen THIS PERSON | 50 | Wife | — | Iowa |
| 21 | Donald Jensen | 26 | Son | Farmer | Iowa |
| 22 | Leona Jensen | 23 | Daughter | — | Iowa |
| 23 | Leroy Jensen | 25 | Son | — | Iowa |
| 24 | Ronald Jensen | 25 | Son | — | Iowa |
| 25 | Vernon Jensen | 21 | Son | Hired Man | Iowa |
| 26 | Inez Jensen | 20 | Daughter | — | Iowa |
| 27 | Nancy Jensen | 12 | Daughter | — | Iowa |
| 28 | Albi Hasen | 50 | Head | Farmer | Iowa |
| 29 | Silie Hasen | 52 | Wife | — | Germany |
| 30 | Chris Boysen | 51 | Head | Farmer | Germany |
| 31 | Anna Boysen | 45 | Wife | — | Iowa |
| 32 | Lydia Boysen | 17 | Daughter | — | Iowa |
| 33 | Lyle Boysen | 17 | Son | — | Iowa |
| 34 | Lloyd Boysen | 17 | Son | — | Iowa |
| 35 | George Hansen | 48 | Head | Farmer | Iowa |
| 36 | Marie Hansen | 33 | Wife | — | Iowa |
| 37 | George Ed Hansen | 3 | Son | — | Iowa |
| 38 | Seth Sellens | 50 | Head | Farmer | Iowa |
| 39 | Helen Sellens | 55 | Wife | — | Iowa |
| 40 | Evelyn Sellens | 11 | Niece | — | Iowa |
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)