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John Jacobs — 1940 US Census Record
Model Tree available1940 United States Federal Census · Shasta-County, California
Our Model Tree links this John Jacobs across the 1920, 1930 and 1940 US Censuses in Shasta-County, California (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Shasta-County, California |
| Surname | Jacobs |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Redding City |
| 1935 Residence (County) | Shasta |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Delivery Truck |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 690 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Truck Driver |
| Township / Ward | Redding City |
| Est. Birth Year | ~1915 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Jacobs | Head | — | 62 | ~1878 |
| Edward Jacobs | Son | — | 16 | ~1924 |
| John Jacobs | Son | — | 25 | ~1915 |
| Mary Jacobs | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Shasta, California
Son, age 5
Shasta, California · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | California |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Shasta, California
Son, age 15
Shasta, California · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | John W. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | California |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Shasta-County, California
Son, age 25
Shasta-County, California · implied b. ~1915 — 4 household members
| Surname | Jacobs |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Redding City |
| 1935 Residence (County) | Shasta |
| Occupation | Truck Driver |
| Industry | Delivery Truck |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 690 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 John Jacobs across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Jacobs (~0.92 confidence) and father John Jacobs (~0.92 confidence) and mother Mary Jacobs (~0.92 confidence) and mother Isabelle Jacobs (~0.92 confidence) and mother Mary Jacobs (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Jacobs
b. ~1878
Source father
● Household
· direct · ~0.92
Father
John Jacobs
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Mary Jacobs
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Isabelle Jacobs
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Mary Jacobs
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Jacobs
Son · 1940 · age 25 · b. ~1915 · California
★ You are viewing this record
Sibling
Edward Jacobs
Sibling · 1940 · age 16
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 — Shasta-County, California
Open full size
1940 US Federal Census — Shasta-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00344-00083)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Richard Frisbel | 4 | Son | — | California |
| 2 | Shirley Frisbel | 1 | Daughter | — | California |
| 3 | June C. Frisbel | 14 | Daughter | — | California |
| 4 | John F. O'Brien | 31 | Head | Senior Engineering | California |
| 5 | Julie A. O'Brien | 31 | Wife | — | Oregon |
| 6 | Mary A. O'Brien | 4 | Daughter | — | California |
| 7 | Patricia D. O'Brien | 1 | Daughter | — | California |
| 8 | Ruth Green | 18 | Maid | Maid | California |
| 9 | Marie E. Schubert | 43 | Head | Landlady | Switzerland |
| 10 | Lucille L. Schubert | 24 | Daughter | Stenographer | California |
| 11 | Eugene Eingo | 27 | Lodger | Bookkeeper | California |
| 12 | Robert Devine | 22 | Lodger | Station Attendant | Montana |
| 13 | Wesley R. Zeiner | 35 | Lodger | Truck Driver | California |
| 14 | William Westphall | 20 | Lodger | Apprentice | California |
| 15 | Leafa O. Rolison | 54 | Head | — | California |
| 16 | Franklin C. Rolison | 34 | Son | Retail Deliveryman | California |
| 17 | Thelma Rolison | 32 | Daughter-in-law | Title Girl | Kansas |
| 18 | John P. Jacobs | 62 | Head | Janitor | Pennsylvania |
| 19 | Mary J. Jacobs | 45 | Wife | — | California |
| 20 | John H. Jacobs THIS PERSON | 25 | Son | Truck Driver | California |
| 21 | Edward M. Jacobs | 16 | Son | — | California |
| 22 | End Of Block | None | — | — | — |
| 23 | Anna G. Reese | 67 | Head | — | California |
| 24 | Joseph H. Murphy | 46 | Head | Stage Driver | Nebraska |
| 25 | Ruth Murphy | 34 | Wife | Cashier | California |
| 26 | Extra Line | None | — | — | — |
| 27 | Extra Line | None | — | — | — |
| 28 | Extra Line | None | — | — | — |
| 29 | Frank M. Wood | 19 | Head | Rodman | California |
| 30 | Marjorie J. Wood | 17 | Wife | — | Oregon |
| 31 | Frank M. Jr. Wood | None | Son | — | California |
| 32 | William D. Lorenz | 64 | Head | — | California |
| 33 | Mary E. Lorenz | 64 | Wife | Hotel Worker | Missouri |
| 34 | Frank A. Marshall | 60 | Head | Laborer | New Hampshire |
| 35 | Nora Marshall | 58 | Wife | — | California |
| 36 | Iva D. Carter | 35 | Head | Practical Nurse | California |
| 37 | Robert R. Carter | 18 | Son | Stock Man | Oregon |
| 38 | Ilo H. Carter | 16 | Son | Janitor | Oregon |
| 39 | Robert W. Pruitt | 37 | Head | Installation Mechanic | California |
| 40 | Julia I. Pruitt | 32 | Wife | Bookkeeper | South Dakota |
Pedigree Summary
John + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)