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James Jacobs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Idaho-County, Idaho
Our Model Tree links this James Jacobs across the 1930 and 1940 US Censuses in Idaho-County, Idaho (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Male
Son
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Idaho-County, Idaho |
| Surname | Jacobs |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Cottonwood Village |
| 1935 Residence (County) | Idaho |
| Additional Details | |
| Class of Worker | 23 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Township / Ward | Cottonwood Village |
| Est. Birth Year | ~1924 |
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 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Irene Jacobs | Daughter | — | 15 | ~1925 |
| Florence Jacobs | Daughter | — | 21 | ~1919 |
| Paul Jacobs | Son | — | 17 | ~1923 |
| Richard Jacobs | Son | — | 19 | ~1921 |
| James Jacobs | Son | — | 16 | ~1924 |
| Helen Jacobs | Spouse | — | 47 | ~1893 |
| Michael Jacobs | Head | — | 57 | ~1883 |
Census Appearances
1930
Idaho, Idaho
Son, age 6
Idaho, Idaho · implied b. ~1924 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | James J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Minnesota |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Idaho-County, Idaho
Son, age 16
Idaho-County, Idaho · implied b. ~1924 — 7 household members
| Surname | Jacobs |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Cottonwood Village |
| 1935 Residence (County) | Idaho |
| Class of Worker | 23 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| 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 James Jacobs across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Jacobs
Son · 1940 · age 16 · b. ~1924 · Idaho
★ You are viewing this record
Sibling
Irene Jacobs
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Jacobs
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Jacobs
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Jacobs
Sibling · 1940 · age 19
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 — Idaho-County, Idaho
Open full size
1940 US Federal Census — Idaho-County, Idaho
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00747-00040)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Michael Jacobs | 57 | Head | Carpenter | Wisconsin |
| 42 | Helen A. Jacobs | 47 | Wife | — | Minnesota |
| 43 | Florence Jacobs | 21 | Daughter | — | Idaho |
| 44 | Richard Jacobs | 19 | Son | Student N.Y.A. | Idaho |
| 45 | Paul Jacobs | 17 | Son | — | Idaho |
| 46 | James Jacobs THIS PERSON | 16 | Son | — | Idaho |
| 47 | Irene Jacobs | 15 | Daughter | — | Idaho |
| 48 | Carl F. Reuter | 58 | Head | Butcher | Germany |
| 49 | Hattie Halthaus | 38 | Daughter | — | Idaho |
| 50 | Ronald Halthaus | 3 | Grandson | — | Idaho |
| 51 | Theodore Halthaus | 1 | Grandson | — | Idaho |
| 52 | Jacob Jensen | 65 | Head | Laborer | Wisconsin |
| 53 | Catherine Jensen | 60 | Wife | — | Illinois |
| 54 | Virgil Jensen | 20 | Son | Laborer | Idaho |
| 55 | William Von Tersch | 45 | Head | Proprietor | Iowa |
| 56 | Mary Von Tersch | 43 | Wife | — | Idaho |
| 57 | Arlie Von Tersch | 19 | Son | Bartender | Idaho |
| 58 | James Von Tersch | 13 | Son | — | Idaho |
| 59 | Roland Wilkes | 60 | Head | Truck Driver | Wisconsin |
| 60 | Alice Wilkes | 45 | Wife | Cook | Idaho |
| 61 | John L. Turner | 46 | Head | Druggist | Idaho |
| 62 | Edith S. Turner | 43 | Wife | — | Iowa |
| 63 | John Jr. Turner | 10 | Son | — | Idaho |
| 64 | Dorothy Kerschmitter | 24 | Lodger | Operator | Idaho |
| 65 | Cecil C. Wimer | 33 | Head | Publisher | Idaho |
| 66 | Alvina Wimer | 34 | Wife | — | Idaho |
| 67 | Marcia Wimer | 1 | Daughter | — | Idaho |
| 68 | Wayne Wimer | 0 | Son | — | Idaho |
| 69 | Theodore De Ford | 33 | Head | Proprietor | Idaho |
| 70 | Clayton Lossand | 22 | Head | Truck Driver | Idaho |
| 71 | Velma Lossand | 20 | Wife | — | Idaho |
| 72 | Herman Seubert | 43 | Head | Co-Proprietor | Idaho |
| 73 | Regina Seubert | 38 | Wife | Co-Proprietor | Iowa |
| 74 | Homer C. Post | 44 | Head | Proprietor | Idaho |
| 75 | Phoebe Post | 42 | Wife | — | New York |
| 76 | Roberta Couch | 18 | Daughter | Housekeeper | Idaho |
| 77 | George Jazkowiak | 30 | Head | Operator & Maintainer | Idaho |
| 78 | Mary Jazkowiak | 25 | Wife | — | Idaho |
| 79 | Teddy Jazkowiak | 1 | Son | — | Idaho |
| 80 | David Jazkowiak | 0 | Son | — | Idaho |
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)