MJ
Mary Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sevier-County, Utah
Our Model Tree links this Mary Jensen across the 1930 and 1940 US Censuses in Sevier-County, Utah (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Female
Daughter
Born: Utah
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sevier-County, Utah |
| Surname | Jensen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Sevier |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Utah |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Township / Ward | Salina City |
| Est. Birth Year | ~1919 |
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 |
|---|---|---|---|---|
| Marjorie Jensen | Daughter | — | 16 | ~1924 |
| Helen Jensen | Daughter | — | 18 | ~1922 |
| Jenny Jensen | Daughter | — | 13 | ~1927 |
| Mary Jensen | Daughter | — | 21 | ~1919 |
| Ruth Jensen | Daughter | — | 9 | ~1931 |
| L Jensen | Head | — | 45 | ~1895 |
| H Jensen | Other | — | 64 | ~1876 |
| Lowell Jensen | Son | — | 11 | ~1929 |
| Euchris Jensen | Spouse | — | 41 | ~1899 |
Census Appearances
1930
Sevier, Utah
Daughter, age 10
Sevier, Utah · implied b. ~1920 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read/Write | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Sevier-County, Utah
Daughter, age 21
Sevier-County, Utah · implied b. ~1919 — 9 household members
| Surname | Jensen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Sevier |
| Income (1939) | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Utah |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
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 21 · b. ~1919 · Utah
★ You are viewing this record
Sibling
Ruth Jensen
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Jensen
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jenny Jensen
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marjorie Jensen
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lowell Jensen
Sibling · 1940 · age 11
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 — Sevier-County, Utah
Open full size
1940 US Federal Census — Sevier-County, Utah
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04217-00973)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary A. Hall | 79 | Head | — | Utah |
| 2 | Clarence Hall | 50 | Son | Farmer | Utah |
| 3 | Marvin L. Jensen | 24 | Head | Teacher | Utah |
| 4 | Vivian D. Jensen | 28 | Wife | — | Utah |
| 5 | M. Leon Jensen | 4 | Son | — | Utah |
| 6 | Gerald Lynn Jensen | 2 | Son | — | Utah |
| 7 | Karl Stott | 39 | Head | Teacher | Utah |
| 8 | Venice D. Stott | 35 | Wife | — | Utah |
| 9 | Karl J. Stott | 8 | Son | — | Utah |
| 10 | Sharla Louise Stott | 2 | Daughter | — | Salina |
| 11 | Miles Curfew | 47 | Head | Barber | Utah |
| 12 | Eva B. Curfew | 42 | Wife | — | Utah |
| 13 | J. M. Christensen | 54 | Head | Electrician | Utah |
| 14 | Gertrude Christensen | 50 | Wife | — | Utah |
| 15 | L. P. Jensen | 45 | Head | Master Mechanic | Denmark |
| 16 | Euchris Jensen | 41 | Wife | — | Utah |
| 17 | Mary Jensen THIS PERSON | 21 | Daughter | — | Utah |
| 18 | Helen Jensen | 18 | Daughter | — | Utah |
| 19 | Marjorie Jensen | 16 | Daughter | — | Utah |
| 20 | Jenny Jensen | 13 | Daughter | — | Utah |
| 21 | Lowell Jensen | 11 | Son | — | Utah |
| 22 | Ruth Jensen | 9 | Daughter | — | Utah |
| 23 | H. S. Jensen | 64 | Father | — | Denmark |
| 24 | Ernest E. Olsen | 67 | Head | — | Indiana |
| 25 | Maggie Olsen | 62 | Wife | — | Minnesota |
| 26 | Joseph D. Gudmundson | 38 | Head | Farmer | Utah |
| 27 | Merle D. Gudmundson | 37 | Wife | — | Utah |
| 28 | Norma Jean Gudmundson | 15 | Daughter | — | Utah |
| 29 | Gerald Gudmundson | 9 | Son | — | Utah |
| 30 | Billy La Dean Gudmundson | 6 | Daughter | — | Utah |
| 31 | James Kane | 54 | Head | Foreman | Utah |
| 32 | Alice Jane Kane | 52 | Wife | — | Utah |
| 33 | Raymond H. Kane | 24 | Son | Electrician | Utah |
| 34 | Genevieve Kane | 12 | Daughter | — | Utah |
| 35 | A. C. Willardson | 54 | Head | Theatre Owner | Utah |
| 36 | Lillie May Willardson | 50 | Wife | Theatre Owner | Utah |
| 37 | O. M. Thompson | 38 | Head | Teacher | Utah |
| 38 | Bessie D. Thompson | 30 | Wife | — | Utah |
| 39 | David Burton Thompson | 9 | Son | — | Utah |
| 40 | Donald J. Thompson | 7 | Son | — | Utah |
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)