MJ
Mary Jensen — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Calhoun, Iowa
Our Model Tree links this Mary Jensen across the 1920, 1930 and 1940 US Censuses in Calhoun, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1868), then head of a 8-person household.
Age 52
b. ~1868
Female
Spouse
Born: Illinois
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Calhoun, Iowa |
| Surname | Jensen |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Logan Township |
| Est. Birth Year | ~1868 |
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.
8 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Esther Jensen | Daughter | — | 8 | ~1912 |
| Marie Jensen | Daughter | — | 10 | ~1910 |
| Margaret Jensen | Daughter | — | 12 | ~1908 |
| Fred Jensen | Head | — | 57 | ~1863 |
| Michael Jensen | Son | — | 14 | ~1906 |
| Gerald Jensen | Son | — | 17 | ~1903 |
| Fred Jensen | Son | — | 15 | ~1905 |
| Mary Jensen | Spouse | — | 52 | ~1868 |
Census Appearances
1920
Calhoun, Iowa
Spouse, age 52
Calhoun, Iowa · implied b. ~1868 — 8 household members
| Surname | Jensen |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Calhoun, Iowa
Other, age 62
Calhoun, Iowa · implied b. ~1868 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jansen |
| Given Name | Mary M |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 32 |
| Father's Birthplace | Ireland (North) |
| Mother's Birthplace | Ireland (North) |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Calhoun-County, Iowa
Spouse, age 72
Calhoun-County, Iowa · implied b. ~1868 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jansen |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Logan Township |
| 1935 Residence (County) | Calhoun |
| Highest Grade | H 3 |
| 1935 Residence | Iowa |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Jensen
Spouse · 1920 · age 52 · b. ~1868 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Calhoun, Iowa
Open full size
1920 US Federal Census — Calhoun, Iowa
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu481unit:0051)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John E. Mcintosh | 19 | Son | Farm Laborer | Iowa |
| 2 | Rose L. Mcintosh | 15 | Daughter | — | Iowa |
| 3 | Louis A. Johnson | 60 | Head | Farmer | Sweden |
| 4 | Cathryn W. Johnson | 51 | Wife | — | Iowa |
| 5 | Esther M. Johnson | 19 | Daughter | — | Iowa |
| 6 | Richard C. Berg | 38 | Head | Farmer | Sweden |
| 7 | Hulda M. Berg | 33 | Wife | — | Iowa |
| 8 | Carl B. Berg | 4 | Son | — | Iowa |
| 9 | Elmer L. Berg | 1 | Son | — | Iowa |
| 10 | Otto A. Kritlow | 34 | Head | Farmer | Iowa |
| 11 | Emma E. Kritlow | 26 | Wife | — | Iowa |
| 12 | Arnold A. Kritlow | 7 | Son | — | Iowa |
| 13 | Lawrence O. Kritlow | 4 | Son | — | Iowa |
| 14 | Robert J. Kritlow | 26 | Brother | Farmer | Iowa |
| 15 | Fred N. Jensen | 57 | Head | Farmer | Holland |
| 16 | Mary M. Jensen THIS PERSON | 52 | Wife | — | Illinois |
| 17 | Gerald J. Jensen | 17 | Son | — | Iowa |
| 18 | Fred H. Jensen | 15 | Son | — | Iowa |
| 19 | Michael O. Jensen | 14 | Son | — | Iowa |
| 20 | Margaret J. Jensen | 12 | Daughter | — | Iowa |
| 21 | Marie Jensen | 10 | Daughter | — | Iowa |
| 22 | Esther F. Jensen | 8 | Daughter | — | Iowa |
| 23 | Chris Wise | 57 | Head | Farmer | Germany |
| 24 | Mary Wise | 57 | Wife | — | Germany |
| 25 | Louis Wise | 30 | Son | Farm Laborer | Germany |
| 26 | Carl Wise | 25 | Son | Farm Laborer | Germany |
| 27 | Richard C. Wise | 21 | Son | — | Illinois |
| 28 | Margaret K. Wise | 18 | Daughter | — | Illinois |
| 29 | William F. Wise | 16 | Son | — | Illinois |
| 30 | Helmuth Wise | 14 | Son | — | Illinois |
| 31 | August C. Wise | 11 | Son | — | Iowa |
| 32 | Anton K. Imhoff | 60 | Head | Farmer | Germany |
| 33 | Fred A. Imhoff | 24 | Son | Farm Laborer | Illinois |
| 34 | Minnie A. Imhoff | 19 | Daughter | — | Iowa |
| 35 | Jessie C. Imhoff | 17 | Daughter | — | Iowa |
| 36 | Anton A. Imhoff | 14 | Son | — | Iowa |
| 37 | Emma W. Imhoff | 11 | Daughter | — | Iowa |
| 38 | Ella M. Imhoff | 10 | Daughter | — | Iowa |
| 39 | Alma L. Imhoff | 6 | Daughter | — | Iowa |
| 40 | Tobe P. Rockwell | 54 | Head | Farm Laborer | Illinois |
| 41 | Bertha B. Rockwell | 32 | Wife | — | Iowa |
| 42 | Tobe G. Rockwell | 1 | Son | — | Iowa |
| 43 | Frank F. Bowers | 40 | Head | Farmer | Iowa |
| 44 | Selma B. Bowers | 24 | Wife | — | Illinois |
| 45 | Elmer F. Bowers | 10 | Son | — | Iowa |
| 46 | Florence A. Bowers | 6 | Daughter | — | Iowa |
| 47 | Alfred E. Gibson | 34 | Head | Farmer | Iowa |
| 48 | Anna L. Gibson | 27 | Wife | — | Illinois |
| 49 | E. Ina T. Gibson | 7 | Daughter | — | Iowa |
| 50 | Velma M. Gibson | 5 | Daughter | — | Iowa |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)