PJ
Peter Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lyon-County, Iowa
Our Model Tree links this Peter Jensen across the 1930 and 1940 US Censuses in Lyon-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1887), then head of a 5-person household.
Age 53
b. ~1887
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lyon-County, Iowa |
| Surname | Jensen |
| Given Name | Peter F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Richland Twp |
| 1935 Residence (County) | Lyon |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 64 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Richland Twp |
| Est. Birth Year | ~1887 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Peter | Age | Birth yr |
|---|---|---|---|---|
| Peter Jensen | Head | — | 53 | ~1887 |
| Mae Jensen | Daughter | — | 19 | ~1921 |
| Pearl Jensen | Daughter | — | 16 | ~1924 |
| Minnie Jensen | Spouse | — | 49 | ~1891 |
| Helen Jensen | Daughter | — | 13 | ~1927 |
Census Appearances
1930
Lyon, Iowa
Head, age 43
Lyon, Iowa · implied b. ~1887 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | Peter J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 25 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Lyon-County, Iowa
Head, age 53
Lyon-County, Iowa · implied b. ~1887 — 5 household members
| Surname | Jensen |
| Given Name | Peter F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Richland Twp |
| 1935 Residence (County) | Lyon |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 64 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Peter Jensen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Peter Jensen
Head · 1940 · age 53 · b. ~1887 · Iowa
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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 — Lyon-County, Iowa
Open full size
1940 US Federal Census — Lyon-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01179-00346)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alice Porter | 16 | Daughter | — | Iowa |
| 2 | Adrian Porter | 14 | Son | — | Iowa |
| 3 | Dorothy Porter | 21 | Daughter | Teacher | Iowa |
| 4 | Timothy Fitzgerald | 51 | Head | Farmer | Illinois |
| 5 | Margaret Fitzgerald | 45 | Wife | — | Iowa |
| 6 | Patrick Fitzgerald | 41 | Brother | Farmer | Iowa |
| 7 | Peter Rumohr | 42 | Head | Farmer | Iowa |
| 8 | Cora Rumohr | 44 | Wife | — | Wisconsin |
| 9 | Loraine Rumohr | 18 | Daughter | — | Iowa |
| 10 | Vernon Rumohr | 19 | Hired Hand | Labor | Iowa |
| 11 | Peter F. Jensen THIS PERSON | 53 | Head | Farmer | Iowa |
| 12 | Minnie Jensen | 49 | Wife | — | Iowa |
| 13 | Mae Jensen | 19 | Daughter | — | Iowa |
| 14 | Pearl Jensen | 16 | Daughter | — | Iowa |
| 15 | Helen Jensen | 13 | Daughter | — | Iowa |
| 16 | Henry E. Niemeyer | 30 | Head | Farmer | Germany |
| 17 | Alice Niemeyer | 32 | Wife | — | Holland |
| 18 | William Niemeyer | 8 | Son | — | Iowa |
| 19 | Anna C. Niemeyer | 4 | Daughter | — | Iowa |
| 20 | Charles R. Niemeyer | 0 | Son | — | Iowa |
| 21 | Marvin K. Bahnsen | 29 | Head | Farmer | Iowa |
| 22 | Arcella J. Bahnsen | 28 | Wife | — | Iowa |
| 23 | Hans J. Stenson | 60 | Head | Farmer | Illinois |
| 24 | Sarah E. Stenson | 65 | Wife | — | Wisconsin |
| 25 | Bernice Hunefeld | 26 | Daughter | — | Iowa |
| 26 | Leroy Hunefeld | 6 | Grandson | — | Iowa |
| 27 | Lavonne Hunefeld | 2 | Granddaughter | — | Iowa |
| 28 | Henry Ahrens | 51 | Head | Farmer | Iowa |
| 29 | Mary Ahrens | 50 | Wife | — | Iowa |
| 30 | Alvin Ahrens | 17 | Son | — | Iowa |
| 31 | Virgil Ahrens | 7 | Son | — | Iowa |
| 32 | Bernie H. Halverson | 45 | Head | Farmer | Iowa |
| 33 | Lenora Halverson | 53 | Wife | — | South Dakota |
| 34 | John Hendriks | 36 | Head | Farmer | Holland |
| 35 | Helen Hendriks | 37 | Daughter | — | Nebraska |
| 36 | Patricia Hendriks | 13 | Daughter | — | Iowa |
| 37 | Alan Hendriks | 11 | Son | — | Iowa |
| 38 | Janet Hendriks | 9 | Daughter | — | Iowa |
| 39 | Jennie Hendriks | 8 | Daughter | — | Iowa |
| 40 | John Hendriks | 5 | Son | — | Iowa |
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)