CJ
Charles Jacobs — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Charles Jacobs across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Charles & Mary — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Jacobs |
| Given Name | Charles Edward |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Shipping Clerk |
| Industry | Dental Supply |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Shipping Clerk |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1919 |
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 Charles | Age | Birth yr |
|---|---|---|---|---|
| Charles Jacobs | Head | — | 51 | ~1889 |
| Harry Jacobs | Son | — | 20 | ~1920 |
| Charlotte Jacobs | Daughter | — | 25 | ~1915 |
| Charles Jacobs | Son | — | 21 | ~1919 |
| Mary Jacobs | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 21
Cook-County, Illinois · implied b. ~1919 — 5 household members
| Surname | Jacobs |
| Given Name | Charles Edward |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Shipping Clerk |
| Industry | Dental Supply |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Charles Jacobs across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Jacobs (~0.92 confidence) and mother Mary Jacobs (~0.92 confidence) and mother Mary Jacobs (~0.92 confidence) and mother Mary Jacobs (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Jacobs
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Mary Jacobs
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Mary Jacobs
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Mary Jacobs
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Charles Jacobs
Son · 1940 · age 21 · b. ~1919 · Illinois
★ You are viewing this record
Sibling
Charlotte Jacobs
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Jacobs
Sibling · 1940 · age 20
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01004-00718)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruth H Johnson | 22 | Daughter | Biller | Illinois |
| 2 | Virginia H Johnson | 18 | Daughter | Office Work | Illinois |
| 3 | Albert H Urbach | 65 | Head | Watchman | Illinois |
| 4 | Emma C Urbach | 63 | Wife | — | Germany |
| 5 | Henrietta M Urbach | 29 | Daughter | Bookkeeper | Illinois |
| 6 | Marie Urbach | 69 | Sister | — | Illinois |
| 7 | William H Neal | 39 | Head | Truck Driver | Pennsylvania |
| 8 | Myrtle R Neal | 37 | Wife | — | Pennsylvania |
| 9 | Arlene B Neal | 12 | Daughter | — | Illinois |
| 10 | Jean D Neal | 10 | Daughter | — | Illinois |
| 11 | Herman H Krueger | 45 | Head | Yard Foreman | Germany |
| 12 | Emma M Krueger | 45 | Wife | — | Illinois |
| 13 | Christ Soller | 83 | Father-in-law | — | Germany |
| 14 | Michal Krastic|Krestich | 46 | Head | Grocer | Yugoslavia |
| 15 | Cecilia Krastic|Krestich | 38 | Wife | — | Yugoslavia |
| 16 | Robert Krastic|Krestich | 17 | Son | — | Illinois |
| 17 | Parcida Krastic|Krestich | 6 | Daughter | — | Illinois |
| 18 | Brad Teofan | 64 | Father-in-law | Gate Man | Yugoslavia |
| 19 | George Siles | 49 | Head | Coal Man | Slovakia |
| 20 | Theresa Siles | 39 | Wife | — | Slovakia |
| 21 | Stephen Belas | 41 | Roomer | Handy Man | Slovakia |
| 22 | Charles H Jacobs | 51 | Head | Mechanic | Illinois |
| 23 | Mary C Jacobs | 46 | Wife | — | Illinois |
| 24 | Charlotte H Jacobs | 25 | Daughter | General Office Work | Illinois |
| 25 | Charles Edward Jacobs THIS PERSON | 21 | Son | Shipping Clerk | Illinois |
| 26 | Harry A Jacobs | 20 | Son | Clerk | Illinois |
| 27 | John H Pohlmann | 61 | Head | Painter | Germany |
| 28 | May E Pohlmann | 54 | Wife | — | Wisconsin |
| 29 | Florence M Pohlmann | 33 | Daughter | Stenographer | Illinois |
| 30 | George J Pohlmann | 28 | Son | Assistant Cashier | Illinois |
| 31 | Frank R Broberg | 53 | Head | Conductor | Sweden |
| 32 | Ella W Broberg | 51 | Wife | — | Sweden |
| 33 | William H Halama | 32 | Head | Tool Clerk | Illinois |
| 34 | Nora B Halama | 31 | Wife | — | Kentucky |
| 35 | Benjamin Stone | 42 | Head | Salesman | Illinois |
| 36 | Loda Stone | 44 | Wife | Nurse | Illinois |
| 37 | Frank F Kaemer | 55 | Head | Painter | Wisconsin |
| 38 | Helena M Kaemer | 55 | Wife | Addresser | Canada |
| 39 | Frank J Kaemer | 25 | Son | Shipper | Illinois |
| 40 | Richard M Kaemer | 22 | Son | Time Keeper | Illinois |
Related Census Records
Pedigree Summary
Charles + 2 siblings
Gen 1 · 4 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)