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Charles Cox — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Charles Cox across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Birdia & Charles — first a son (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Male
Son
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Cox |
| Given Name | Charles W. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | G-3 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1916 |
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 Charles | Age | Birth yr |
|---|---|---|---|---|
| Helen Cox | Daughter | — | 19 | ~1921 |
| Birdia Parks | Head | — | 59 | ~1881 |
| Oakley Parks | Son | — | 22 | ~1918 |
| Charles Cox | Son | — | 24 | ~1916 |
Census Appearances
1920
Marion, Indiana
Son, age 4
Marion, Indiana · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | none |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 14
Marion, Indiana · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Charles H Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Son, age 24
Marion-County, Indiana · implied b. ~1916 — 4 household members
| Surname | Cox |
| Given Name | Charles W. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Class of Worker | 0 |
| Highest Grade | G-3 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Birdia Parks (~0.92 confidence) and father Charles Cox (~0.92 confidence) and father Charles Cox (~0.92 confidence) and mother Bertha Cox (~0.92 confidence) and mother Bertha Cox (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Birdia Parks
b. ~1881
Source mother
● Household
· direct · ~0.92
Father
Charles Cox
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Charles Cox
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Bertha Cox
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Bertha Cox
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Charles Cox
Son · 1940 · age 24 · b. ~1916 · Indiana
★ You are viewing this record
Sibling
Helen Cox
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Oakley Parks
Sibling · 1940 · age 22
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
25 people indexed on this census page (nara:1940:m-t0627-01130-00549)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Milton W. Hurgason | 29 | Head | Electrician | Iowa |
| 3 | Vivian L. Hurgason | 26 | Wife | Assembler | Indiana |
| 5 | Warren D. Hill | 21 | Son | Shipping Clerk | Indiana |
| 6 | Juanita F. Hill | 9 | Daughter | — | Indiana |
| 7 | Elizabeth A. Hill | 6 | Daughter | — | Indiana |
| 9 | Carl F. Klotzkin | 17 | Son | Laborer | Indiana |
| 11 | Robert A. Babcock | 31 | Head | Service Man | Colorado |
| 12 | Elizabeth R. Babcock | 31 | Wife | — | Indiana |
| 14 | Ernest Livercote | 28 | Head | Truck Driver | Indiana |
| 15 | Mabel L. Livercote | 26 | Wife | — | Indiana |
| 17 | Alta W. Rich | 40 | Head | Operator | Maryland |
| 18 | Arville L. Rich | 19 | Son | Printer | W. Virginia |
| 20 | Birdia Parks | 59 | Head | — | Kentucky |
| 21 | Oakley D. Parks | 22 | Son | Laborer | Indiana |
| 23 | Charles W. Jr. Cox THIS PERSON | 24 | Son | — | Indiana |
| 24 | Helen R. Cox | 19 | Daughter | — | Indiana |
| 26 | Victor F. Eickhoff | 38 | Head | Assembler | Indiana |
| 27 | Myrtle Eickhoff | 38 | Wife | — | Kentucky |
| 28 | James G. Flanders | 5 | Lodger | — | Indiana |
| 29 | Lloyd A. Roberts | 21 | Son-in-law | Machine Operator | Indiana |
| 30 | Pauline M. Roberts | 19 | Daughter | Cashier | Indiana |
| 31 | George M. Kanigan | 36 | Head | Proprietor | Indiana |
| 32 | Clara C. Kanigan | 34 | Wife | — | Ohio |
| 34 | James E. Plummer | 28 | Head | Truck Driver | Indiana |
| 35 | Velma E. Plummer | 24 | Wife | Clerk | Indiana |
Pedigree Summary
Charles + 2 siblings
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)