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Charles Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this Charles Cooper across the 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed), with identified parents Clarence & Margaret — first a head (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Cooper |
| Given Name | Charles |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| Additional Details | |
| Occupation | Second helper on Open Hearth |
| Industry | Steel Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 444 |
| Highest Grade | Hs 1 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Second Helper On Open Hearth |
| Township / Ward | Election District No 9 |
| Est. Birth Year | ~1913 |
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 |
|---|---|---|---|---|
| Charles Cooper | Head | — | 27 | ~1913 |
| Edward Hopkins | Other | — | 70 | ~1870 |
| Lance Cooper | Son | — | 1 | ~1939 |
| Elaine Cooper | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Baltimore, Maryland
Son, age 6
Baltimore, Maryland · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Clarence E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 17
Baltimore, Maryland · implied b. ~1913 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Clarence G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Head, age 27
Baltimore-County, Maryland · implied b. ~1913 — 4 household members
| Surname | Cooper |
| Given Name | Charles |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| Occupation | Second helper on Open Hearth |
| Industry | Steel Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 444 |
| Highest Grade | Hs 1 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Clarence Cooper (~0.92 confidence) and mother Margaret Cooper (~0.92 confidence) and mother Marguerite Cooper (~0.92 confidence) and father Clarence Cooper (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Clarence Cooper
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Margaret Cooper
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Marguerite Cooper
b. ~1873
Source mother
● Household
· direct · ~0.92
Father
Clarence Cooper
b. ~1877
Source father
● Household
· direct · ~0.92
This person
Anchor record
Charles Cooper
Head · 1940 · age 27 · b. ~1913 · Maryland
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Baltimore-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01505-00175)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Grace, Robert D. Grace | 4 | Grand-son | — | Maryland |
| 2 | Charles Cooper THIS PERSON | 27 | Head | Second Helper On Open Hearth | Maryland |
| 3 | Elaine Cooper | 26 | Wife | — | West Virginia |
| 4 | Lance Cooper | 1 | Son | — | Maryland |
| 5 | Edward Hopkins | 70 | Father-in-law | — | England |
| 6 | Edward Callahan | 39 | Head | Tenant Farmer | Maryland |
| 7 | Ethel Callahan | 43 | Wife | — | Maryland |
| 8 | Edward Callahan | 15 | Son | — | Maryland |
| 9 | Peg Anne Callahan | 12 | Daughter | — | Maryland |
| 10 | Frank G. Mccusker | 50 | Head | Clerk | Maryland |
| 11 | Christina M. Mccusker | 50 | Wife | — | Maryland |
| 12 | Frank G. Jr. Mccusker | 29 | Son | Salesman | Maryland |
| 13 | Peggy Mccusker | 11 | Daughter-in-law | — | Maryland |
| 14 | Grace Demko | 22 | Servant | Servant | Maryland |
| 15 | William Gorman | 63 | Head | Farmer | Maryland |
| 16 | Mary Gorman | 44 | Wife | — | Maryland |
| 17 | Harold Kapp | 45 | Head | Shipping Commissioner Agent | Maryland |
| 18 | Alice Kapp | 29 | Wife | — | Virginia |
| 19 | Bruce Kapp | 5 | Son | — | Maryland |
| 20 | George H. Muller | 53 | Head | Painter | Maryland |
| 21 | Della D. Muller | 51 | Wife | — | Maryland |
| 22 | Jacob Rye | 64 | Head | Farmer | Maryland |
| 23 | Ernestine Rye | 64 | Wife | — | Maryland |
| 24 | G. Leonard Rye | 38 | Head | Proprietor | Maryland |
| 25 | Anna K. Rye | 34 | Wife | — | Maryland |
| 26 | Caroline A. Rye | 13 | Daughter | — | Maryland |
| 27 | George L. Jr. Rye | 11 | Son | — | Maryland |
| 28 | Doris M. Rye | 7 | Daughter | — | Maryland |
| 29 | Ruth S. Rye | 2 | Daughter | — | Maryland |
| 30 | Leland Moyer | 22 | Head | Jobber | Maryland |
| 31 | Ruth E. Moyer | 18 | Wife | — | Maryland |
| 32 | Kenneth Patten | 20 | Head | Carpenter | Maryland |
| 33 | Mary Patten | 15 | Wife | — | Maryland |
| 34 | Leon Carroll | 30 | Head | Huckster | Maryland |
| 35 | Amelia Carroll | 23 | Wife | — | Maryland |
| 36 | Nancy Lee Carroll | 5 | Daughter | — | Maryland |
| 37 | Charles Carroll | 4 | Son | — | Maryland |
| 38 | G. Peter Lader | 51 | Head | Dairy Farmer | Maryland |
| 39 | Louisa J. Lader | 48 | Wife | — | Maryland |
| 40 | Robert P. Lader | 20 | Son | Farm Laborer | Maryland |
Pedigree Summary
Charles
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)