MJ
Mary Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boise-County, Idaho
Our Model Tree links this Mary Jensen across the 1930 and 1940 US Censuses in Boise-County, Idaho (XGBoost, ~Confirmed) — first a spouse (b.~1897), then head of a 9-person household.
Age 43
b. ~1897
Female
Spouse
Born: Idaho
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Boise-County, Idaho |
| Surname | Jensen |
| Given Name | Mary F. B. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (County) | Boise |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Township / Ward | Horse Shoe Bend Precinct |
| Est. Birth Year | ~1897 |
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 |
|---|---|---|---|---|
| Elinore Jensen | Daughter | — | 13 | ~1927 |
| Margaret Jensen | Daughter | — | 9 | ~1931 |
| George Jensen | Head | — | 53 | ~1887 |
| Donald Jensen | Son | — | 17 | ~1923 |
| Carl Jensen | Son | — | 21 | ~1919 |
| Verne Jensen | Son | — | 1 | ~1939 |
| John Jensen | Son | — | 19 | ~1921 |
| Elgar Jensen | Son | — | 15 | ~1925 |
| Mary Jensen | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Boise, Idaho
Other, age 33
Boise, Idaho · implied b. ~1897 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | Mary G. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Idaho |
| Age at First Marriage | 18 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Boise-County, Idaho
Spouse, age 43
Boise-County, Idaho · implied b. ~1897 — 9 household members
| Surname | Jensen |
| Given Name | Mary F. B. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (County) | Boise |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
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 43 · b. ~1897 · Idaho
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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 — Boise-County, Idaho
Open full size
1940 US Federal Census — Boise-County, Idaho
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00740-00059)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Darlene Boyer | 1 | daughter | — | Idaho |
| 2 | Toni Boyer | 0 | daughter | — | Idaho |
| 3 | John Fox | 61 | Hired hand | Logging | Iowa |
| 4 | Andrew R. Thompson | 77 | Head | Operator | Norway |
| 5 | Isabella D. Thompson | 73 | Wife | — | Idaho |
| 6 | Mattie D. Zimmer | 48 | Head | — | Mississippi |
| 7 | George W. Zimmer | 21 | son | Farming | Idaho |
| 8 | Leland M. Zimmer | 19 | son | Farming | Idaho |
| 9 | Samuel W. Gilbert | 49 | Head | 20 | Kansas |
| 10 | Lucinda Gilbert | 52 | wife | — | Missouri |
| 11 | Howard W. Gilbert | 20 | son | Wood Cutter | Nebraska |
| 12 | Erma A. Gilbert | 17 | daughter | — | Nebraska |
| 13 | Lula M. Gilbert | 50 | daughter in law | — | Missouri |
| 14 | Floyd D. Mofford | 59 | Head | 50 | Iowa |
| 15 | Ida Mofford | 53 | Wife | — | Wyoming |
| 16 | Leslie M. Mofford | 21 | son | Sawyer | Wyoming |
| 17 | Gladys K. Mofford | 21 | daughter | — | Washington |
| 18 | Willard F. Mofford | 7 | son | — | Washington |
| 19 | Patricia J. Mofford | 5 | daughter | — | Washington |
| 20 | George J. Jensen | 53 | Head | Mine Foreman | Norway |
| 21 | Mary F. B. Jensen THIS PERSON | 43 | Wife | — | Idaho |
| 22 | Carl T. Jensen | 21 | son | Gold Mining | Idaho |
| 23 | John W. Jensen | 19 | son | — | Idaho |
| 24 | Donald B. Jensen | 17 | son | Gold Mining | Idaho |
| 25 | Elgar B. Jensen | 15 | son | Gold Mining | Idaho |
| 26 | Elinore F. Jensen | 13 | daughter | — | Idaho |
| 27 | Margaret A. Jensen | 9 | daughter | — | Idaho |
| 28 | Verne B. Jensen | 1 | son | — | Idaho |
| 29 | Edward O. Vanson | 51 | Head | 50 | Idaho |
| 30 | Ollie N. Vanson | 30 | Wife | — | Idaho |
| 31 | Mary E. Vanson | 18 | daughter | — | California |
| 32 | Floyd E. Vanson | 15 | son | — | Oregon |
| 33 | James V. Vanson | 9 | son | — | Idaho |
| 34 | O. E. Edstrom | 60 | Head | Wood Cutter | Sweden |
| 35 | Edward Vore | 40 | Lodger | Teamster | Norway |
| 36 | Frank Sisemore | 30 | Head | Sawyer | California |
| 37 | Raymond Tifft | 24 | Lodger | Sawyer | Wyoming |
| 38 | Roy Frontline | 46 | Lodger | 40 | Iowa |
| 39 | Lester V. Bershaw | 34 | Lodger | Sawyer | Nebraska |
| 40 | Kate Walker | 68 | Head | — | Oregon |
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)