MJ
Mary Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jackson-County, Missouri
Our Model Tree links this Mary Jensen across the 1930 and 1940 US Censuses in Jackson-County, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 9-person household.
Age 10
b. ~1930
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jackson-County, Missouri |
| Surname | Jensen |
| Given Name | Mary D. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Washington Twp |
| 1935 Residence (County) | Jackson |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Washington Twp |
| Est. Birth Year | ~1930 |
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 |
|---|---|---|---|---|
| Mary Jensen | Daughter | — | 10 | ~1930 |
| Charlotte Jensen | Daughter | — | 12 | ~1928 |
| Margaret Jensen | Daughter | — | 14 | ~1926 |
| Alberta Jensen | Daughter | — | 18 | ~1922 |
| Holger Jensen | Head | — | 46 | ~1894 |
| Harry Jensen | Son | — | 16 | ~1924 |
| Julius Jensen | Son | — | 4 | ~1936 |
| Christian Jensen | Son | — | 8 | ~1932 |
| Mary Jensen | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Jackson, Missouri
Daughter, age
Jackson, Missouri · implied b. ~1930 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | Mary I. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Jackson-County, Missouri
Daughter, age 10
Jackson-County, Missouri · implied b. ~1930 — 9 household members
| Surname | Jensen |
| Given Name | Mary D. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Washington Twp |
| 1935 Residence (County) | Jackson |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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
Daughter · 1940 · age 10 · b. ~1930 · Missouri
★ You are viewing this record
Sibling
Margaret Jensen
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Jensen
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charlotte Jensen
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julius Jensen
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Christian Jensen
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alberta Jensen
Sibling · 1940 · age 18
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 — Jackson-County, Missouri
Open full size
1940 US Federal Census — Jackson-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02116-00698)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marion Mayer | 50 | Head | Laborer | Hungary |
| 2 | Juliette Mayer | 42 | Wife | — | France |
| 3 | Jeanette Mayer | 19 | Daughter | New Worker | Ohio |
| 4 | Helen Mayer | 16 | Daughter | New Worker | Ohio |
| 5 | Maurice Mayer | 15 | Son | — | Ohio |
| 6 | Harry Mayer | 14 | Son | — | France |
| 7 | Ruth Grace Mayer | 12 | Daughter | — | Missouri |
| 8 | Jerome Roger Mayer | 4 | Son | — | Missouri |
| 9 | Holger Jensen | 46 | Head | Operator | Denmark |
| 10 | Mary E. Jensen | 44 | Wife | — | Missouri |
| 11 | Alberta L. Jensen | 18 | Daughter | — | Missouri |
| 12 | Harry T. Jensen | 16 | Son | — | Missouri |
| 13 | Margaret E. Jensen | 14 | Daughter | — | Missouri |
| 14 | Charlotte L. Jensen | 12 | Daughter | — | Missouri |
| 15 | Mary D. Jensen THIS PERSON | 10 | Daughter | — | Missouri |
| 16 | Christian T. Jensen | 8 | Son | — | Missouri |
| 17 | Julius T. Jensen | 4 | Son | — | Missouri |
| 18 | Maude Willis | 45 | Head | Housework | Arkansas |
| 19 | Curtis Wayne Willis | 9 | Son | — | Arkansas |
| 20 | Louis E. Bevens | 44 | Head | Laborer | Missouri |
| 21 | Frances S. Bevens | 36 | Wife | — | Illinois |
| 22 | Mary Ellen Bevens | 16 | Daughter | — | Missouri |
| 23 | George Nicholas Bevens | 14 | Son | — | Missouri |
| 24 | Frank Koorn | 72 | Head | Odd Jobs | — |
| 25 | Mary Helen Koorn | 34 | Wife | Stenographer | — |
| 26 | Douglas K. Mcwain | 54 | Head | Maintenance | Vermont |
| 27 | Irene Mcwain | 47 | Wife | — | Nebraska |
| 28 | Doris Mcwain | 17 | Daughter | — | Missouri |
| 29 | William H. Smith | 64 | Head | Labor | — |
| 30 | Iva Anette Smith | 66 | Wife | — | — |
| 31 | Roy Bell | 33 | Head | Truck Driver | Oklahoma |
| 32 | Carrie O. Bell | 27 | Wife | — | Missouri |
| 33 | Gladys Lee Bell | 11 | Daughter | — | Missouri |
| 34 | Eugene L. Bell | 9 | Son | — | Missouri |
| 35 | Leroy Jr. Bell | 8 | Son | — | Missouri |
| 36 | Ruby Marie Bell | 5 | Daughter | — | Missouri |
| 37 | Harry Earl Bell | 3 | Son | — | Missouri |
| 38 | Anita Louise Bell | 1 | Daughter | — | Missouri |
| 39 | George W. Raines | 37 | Head | Truck Driver | — |
| 40 | Marie J. Raines | 38 | Wife | — | Arkansas |
Related Census Records
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)