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Charles Armstrong — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Charles Armstrong across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Frank & Luke — first a son (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Armstrong |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Gas station Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2400 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Truck Driver |
| Township / Ward | Chicago |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Charles | Age | Birth yr |
|---|---|---|---|---|
| Joseph Armstrong | Son | — | 38 | ~1902 |
| Charles Armstrong | Son | — | 29 | ~1911 |
| Frank Armstrong | Head | — | 70 | ~1870 |
Census Appearances
1920
Cook, Illinois
Son, age 9
Cook, Illinois · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 19
Cook, Illinois · implied b. ~1911 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 29
Cook-County, Illinois · implied b. ~1911 — 3 household members
| Surname | Armstrong |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Truck Driver |
| Industry | Gas station Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2400 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Armstrong across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Armstrong (~0.92 confidence) and father Luke Mahon (~0.92 confidence) and father William Armstrong (~0.92 confidence) and mother Julia Armstrong (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Armstrong
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Luke Mahon
b. ~1888
Source father
● Household
· direct · ~0.92
Father
William Armstrong
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Julia Armstrong
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Charles Armstrong
Son · 1940 · age 29 · b. ~1911 · Illinois
★ You are viewing this record
Sibling
Joseph Armstrong
Sibling · 1940 · age 38
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-t0627-00966-00329)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank Armstrong | 70 | Head | — | Illinois |
| 42 | Joseph Armstrong | 38 | Son | — | Illinois |
| 43 | Charles Armstrong THIS PERSON | 29 | Son | Truck Driver | Illinois |
| 44 | Joseph Vondrak | 36 | Head | Stock Keeper | Czechoslovakia |
| 45 | Marie Vondrak | 34 | Wife | — | Illinois |
| 46 | Joseph Jr. Vondrak | 10 | Son | — | Illinois |
| 47 | Patricia Vondrak | 9 | Daughter | — | Illinois |
| 48 | Frank Nagl | 49 | Head | Watchman | Czechoslovakia |
| 49 | Josephine Nagl | 50 | Wife | — | Czechoslovakia |
| 50 | Frank Jr. Nagl | 25 | Son | Machinist | Illinois |
| 51 | Ervin Nagl | 22 | Son | Machinist | Illinois |
| 52 | Otto Nagl | 14 | Son | — | Illinois |
| 53 | Charles Welcome | 48 | Head | — | Germany |
| 54 | Ferdinand Kahn | 66 | Head | — | Czechoslovakia |
| 55 | Louis Hahm | Hahn | 36 | Son | Mechanic | Illinois |
| 56 | Anna Hahm | Hahn | 38 | Daughter | Packer | Illinois |
| 57 | Laddie Hahm | Hahn | 35 | Son | Chauffeur | Illinois |
| 58 | John Koenig | 38 | Head | Bench Worker | Illinois |
| 59 | Bessie Koenig | 32 | Wife | — | Illinois |
| 60 | Eugene Koenig | 10 | Son | — | Illinois |
| 61 | Joan Koenig | 5 | Daughter | — | Illinois |
| 62 | Edwin Johnson | 44 | Head | Contractor | Illinois |
| 63 | Jeanette Johnson | 40 | Wife | — | Illinois |
| 64 | Lawrence Johnson | 19 | Son | Book Keeper | Illinois |
| 65 | Betty Rose Johnson | 8 | Daughter | — | Illinois |
| 66 | Joseph Breeka | 60 | Head | Labor | Czechoslovakia |
| 67 | Marie Breeka | 55 | Wife | — | Czechoslovakia |
| 68 | Vlasta Breeka | 32 | Daughter | Tailoring | Illinois |
| 69 | Joseph Jr. Breeka | 11 | Son | — | Illinois |
| 70 | John Mixa | 45 | Head | Tavern | Czechoslovakia |
| 71 | Rose Mixa | 44 | Wife | — | Czechoslovakia |
| 72 | Iona Mixa | 18 | Daughter | Bar Tender | Illinois |
| 73 | Robert Mixa | 16 | Son | — | Illinois |
| 74 | Frank Ringl | 55 | Head | Conductor | Czechoslovakia |
| 75 | Marie Ringl | 54 | Wife | — | Czechoslovakia |
| 76 | George Ringl | 36 | Son | Shipping Clerk | Illinois |
| 77 | Mahlon Ringl | 24 | Son | Order Filler | Illinois |
| 78 | Ella Ringl | 18 | Daughter | New Worker | Illinois |
| 79 | Rose Ringl | 15 | Daughter | — | Illinois |
| 80 | Bronie Urbaniac | 70 | Head | — | Czechoslovakia |
Pedigree Summary
Charles + 1 sibling
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)