RJ
Robert Jensen — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Day, South Dakota
Our Model Tree links this Robert Jensen across the 1930 and 1940 US Censuses in Day, South Dakota (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 7-person household.
Age 2
b. ~1928
Male
Son
Born: South Dakota
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Day, South Dakota |
| Surname | Jensen |
| Given Name | Robert D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | South Dakota |
| Additional Details | |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | Liberty Township |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Violet Jensen | Daughter | — | 8 | ~1922 |
| Arden Jensen | Son | — | 5 | ~1925 |
| Henry Jensen | Head | — | 31 | ~1899 |
| Viola Jensen | Daughter | — | 8 | ~1922 |
| Mervin Jensen | Son | — | 10 | ~1920 |
| Robert Jensen | Son | — | 2 | ~1928 |
| Anna Jensen | Spouse | — | 32 | ~1898 |
Census Appearances
1930
Day, South …
Son, age 2
Day, South Dakota · implied b. ~1928 — 7 household members
| Surname | Jensen |
| Given Name | Robert D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | South Dakota |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Day-County, South …
Son, age 12
Day-County, South Dakota · implied b. ~1928 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jenson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Independence Township |
| 1935 Residence (County) | Day |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Robert Jensen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Jensen
Son · 1930 · age 2 · b. ~1928 · South Dakota
★ You are viewing this record
Sibling
Violet Jensen
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Viola Jensen
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arden Jensen
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mervin Jensen
Sibling · 1930 · age 10
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
1930 US Federal Census — Day, South Dakota
Open full size
1930 US Federal Census — Day, South Dakota
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2222unit:0158)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Carl Mahlum | 47 | Head | Farmer | Minnesota |
| 52 | Anna Mahlum | 54 | Sister | — | Norway |
| 53 | Simon Iverson | 78 | Head | Farmer | Norway |
| 54 | Berit Iverson | 80 | Wife | — | Norway |
| 55 | Melvin J. Iverson | 36 | Son | Laborer | South Dakota |
| 56 | Leonard B. Iverson | 19 | Son | Laborer | South Dakota |
| 57 | Alley P. Jensen | 40 | Head | Farmer | South Dakota |
| 58 | Amelia D. Jensen | 38 | Wife | — | South Dakota |
| 59 | Phyllis L. Jensen | 15 | Daughter | — | South Dakota |
| 60 | Carol A. Jensen | 13 | Daughter | — | South Dakota |
| 61 | Percy A. Jensen | 9 | Son | — | South Dakota |
| 62 | Ole Pederson | 79 | Head | — | Norway |
| 63 | Mari Pederson | 80 | Wife | — | Norway |
| 64 | Erik O. Pederson | 38 | Nephew | Farmer | South Dakota |
| 65 | Ludvig M. Amundson | 36 | Head | Farmer | South Dakota |
| 66 | Hannah L. Amundson | 27 | Wife | — | South Dakota |
| 67 | Beverly E. Amundson | 2 | Daughter | — | South Dakota |
| 68 | Loretta M. Amundson | 0 | Daughter | — | South Dakota |
| 69 | Mary E. Amundson | 72 | Mother | — | Norway |
| 70 | Knute Ronshaugen | 49 | Head | Farmer | Norway |
| 71 | Sarah J. Ronshaugen | 43 | Wife | — | South Dakota |
| 72 | Calmer M. Ronshaugen | 22 | Son | Laborer | South Dakota |
| 73 | Martha Ronshaugen | 73 | Head | — | Norway |
| 74 | Gilda Ronshaugen | 32 | Daughter | — | South Dakota |
| 75 | Rubin A. Larson | 36 | Head | Laborer | South Dakota |
| 76 | Mathilda E. Larson | 40 | Wife | — | South Dakota |
| 77 | Loyd A. Larson | 1 | Son | — | South Dakota |
| 78 | Clarence A. Olson | 19 | Nephew | Laborer | South Dakota |
| 79 | Olaf Ronshaugen | 37 | Head | Farmer | South Dakota |
| 80 | Minnie Ronshaugen | 31 | Wife | — | Minnesota |
| 81 | Ruth G. Ronshaugen | 3 | Daughter | — | South Dakota |
| 82 | John P. Bundrock | 35 | Head | Farmer | South Dakota |
| 83 | Elma M. Bundrock | 28 | Wife | — | South Dakota |
| 84 | James E. Bundrock | 0 | Son | — | South Dakota |
| 85 | Henry E. Jensen | 31 | Head | Laborer | South Dakota |
| 86 | Anna Jensen | 32 | Wife | — | South Dakota |
| 87 | Mervin E. Jensen | 10 | Son | — | South Dakota |
| 88 | Violet Jensen | 8 | Daughter | — | South Dakota |
| 89 | Viola Jensen | 8 | Daughter | — | South Dakota |
| 90 | Arden L. Jensen | 5 | Son | — | South Dakota |
| 91 | Robert D. Jensen THIS PERSON | 2 | Son | — | South Dakota |
| 92 | John A. Gunderson | 47 | Head | — | Minnesota |
| 93 | Merit Gunderson | 47 | Wife | — | Norway |
| 94 | Mervin J. Gunderson | 8 | Son | — | South Dakota |
| 95 | Rubin L. Gunderson | 2 | Son | — | South Dakota |
| 96 | Emil M. Olson | 23 | Step Son | Farmer | South Dakota |
| 97 | Laura I. Olson | 16 | Step Daughter | — | South Dakota |
| 98 | Julia M. Olson | 12 | Step Daughter | — | South Dakota |
| 99 | Ernest K. Rye | 27 | Head | Farmer | South Dakota |
| 100 | Agnes L. Rye | 20 | Wife | — | Norway |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)