WC
William Cooper — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this William Cooper across the 1920, 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 9-person household.
Age 41
b. ~1889
Male
Head
Born: Maryland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Cooper |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Foreman |
| Industry | Bridge |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | 10.00 |
| Home Value / Rent | R |
| Veteran | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Foreman |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1889 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Cooper | Daughter | — | 7 | ~1923 |
| Catherine Cooper | Daughter | — | 14 | ~1916 |
| William Cooper | Head | — | 41 | ~1889 |
| James Cooper | Son | — | 3 | ~1927 |
| Edward Cooper | Son | — | 1 | ~1929 |
| Warren Cooper | Son | — | 5 | ~1925 |
| William Cooper | Son | — | 12 | ~1918 |
| Leroy Cooper | Son | — | 20 | ~1910 |
| Hallie Cooper | Spouse | — | 40 | ~1890 |
Census Appearances
1920
X, Maryland
Head, age 30
X, Maryland · implied b. ~1890 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | William Jr |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Head, age 41
Baltimore, Maryland · implied b. ~1889 — 9 household members
| Surname | Cooper |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Foreman |
| Industry | Bridge |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | 10.00 |
| Home Value / Rent | R |
| Veteran | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Other, age 51
Baltimore-City-County, Maryland · implied b. ~1889 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | William |
| Relationship to Head | Father-in-law |
| Sex | M |
| Color / Race | Black |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (County) | Baltimore City |
| Occupation | Truck driver |
| Industry | Florist |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| 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 William Cooper across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Cooper
Head · 1930 · age 41 · b. ~1889 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Baltimore, Maryland
Open full size
1930 US Federal Census — Baltimore, Maryland
Page Contents
25 people indexed on this census page (ia:1930:15thcensus866unit:0822)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frederick Schilbeurauf | 23 | Head | None | Germany |
| 2 | Elizabeth Schilbeurauf | 64 | Wife | None | Maryland |
| 3 | Milton Arnold | 24 | Head | Painter | Maryland |
| 4 | Thelma Arnold | 24 | Wife | None | Maryland |
| 5 | Thelma Arnold | 3 | Daughter | None | Maryland |
| 6 | Milton Jr Arnold | 1 | Son | None | Maryland |
| 7 | J C Hamman | 66 | Head | None | Maryland |
| 8 | Emily Hamman | 63 | Wife | None | Maryland |
| 9 | Frederick Mauch | 65 | Head | None | Maryland |
| 10 | Howard Smith | 39 | Head | Electrician | Missouri |
| 11 | Alice Smith | 33 | Wife | None | Maryland |
| 12 | Howard Jr Smith | 9 | Son | None | Maryland |
| 13 | Irene Smith | 8 | Daughter | None | Maryland |
| 14 | Vivian Smith | 6 | Daughter | None | Maryland |
| 15 | Betty Smith | 2 | Daughter | None | Maryland |
| 16 | Elizabeth Dronsholsky | 58 | Mother-in-law | None | Poland |
| 17 | William Cooper THIS PERSON | 41 | Head | Foreman | Maryland |
| 18 | Hallie Cooper | 40 | Wife | None | Maryland |
| 19 | Leroy Cooper | 20 | Son | Laborer | Maryland |
| 20 | Catherine Cooper | 14 | Daughter | None | Maryland |
| 21 | William Jr Cooper | 12 | Son | None | Maryland |
| 22 | Elizabeth Cooper | 7 | Daughter | None | Maryland |
| 23 | Warren Cooper | 5 | Son | None | Maryland |
| 24 | James Cooper | 3 | Son | None | Maryland |
| 25 | Edward Cooper | 1 | Son | None | Maryland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)