RZ
Robert Zimmerman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Robert Zimmerman across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1908), then head of a 4-person household.
Age 32
b. ~1908
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Zimmerman |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore city |
| 1935 Residence (County) | Baltimore city |
| Additional Details | |
| Occupation | Clerk |
| Industry | Wholesale Grocery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | H 4 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Clerk |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1908 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Dorothea Zimmerman | Spouse | — | 29 | ~1911 |
| Robert Zimmerman | Head | — | 32 | ~1908 |
| Johanna Zimmerman | Daughter | — | 6 | ~1934 |
| John Hudson | Other | — | 62 | ~1878 |
Census Appearances
1920
Baltimore, Maryland
Other, age 13
Baltimore, Maryland · implied b. ~1907 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Robert J. |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Other, age 23
Baltimore, Maryland · implied b. ~1907 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Robert |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| 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-City-County, Maryland
Head, age 32
Baltimore-City-County, Maryland · implied b. ~1908 — 4 household members
| Surname | Zimmerman |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore city |
| 1935 Residence (County) | Baltimore city |
| Occupation | Clerk |
| Industry | Wholesale Grocery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | H 4 |
| 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 Robert Zimmerman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Zimmerman
Head · 1940 · age 32 · b. ~1908 · 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-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01542-00185)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Catalano | 22 | Son | Executive Secretary | Maryland |
| 2 | Mary A Catalano | 19 | Daughter | — | Maryland |
| 3 | David Blumenthal | 66 | Head | Foreman | Baltic Provinces |
| 4 | Bertha Blumenthal | 64 | Wife | — | Baltic Provinces |
| 5 | Catherine Conner | 45 | Head | — | Mexico |
| 6 | Thomas M Conner | 24 | Son | Supply Clerk | Maryland |
| 7 | Catherine Conner | 23 | Daughter | — | Maryland |
| 8 | William D Schaeffer | 58 | Head | Traveling Salesman | Maryland |
| 9 | Edna Schaeffer | 57 | Wife | — | Maryland |
| 10 | Rowland Schaeffer | 35 | Son | Attendant | Maryland |
| 11 | Mildred Schaeffer | 34 | Daughter | Clerical | Maryland |
| 12 | Frank Libertini | 51 | Head | Barber | Italy |
| 13 | Antoinette Libertini | 40 | Wife | — | Italy |
| 14 | Josephine Libertini | 22 | Daughter | Manager | Maryland |
| 15 | James Libertini | 19 | Son | — | Maryland |
| 16 | William P G Hughes | 44 | Head | Bricklayer | New York |
| 17 | John M Hughes | 36 | Brother | Bricklayer | New York |
| 18 | Robert H Hughes | 30 | Brother | Mechanic Helper | New York |
| 19 | Robert Zimmerman THIS PERSON | 32 | Head | Clerk | Maryland |
| 20 | Dorothea Zimmerman | 29 | Wife | — | Maryland |
| 21 | Johanna Zimmerman | 6 | Daughter | — | Maryland |
| 22 | John Hudson | 62 | In-law | Pharmacist | Maryland |
| 23 | Edward Christie | 35 | Head | Artist | Maryland |
| 24 | Catherine Christie | 33 | Wife | — | Maryland |
| 25 | Betty Christie | 12 | Daughter | — | Maryland |
| 26 | Isabelle Christie | 8 | Daughter | — | Maryland |
| 27 | William Lewis | 47 | Head | Assistant Manager | Maryland |
| 28 | Edna Lewis | 47 | Wife | — | Maryland |
| 29 | Daniel Sheets | 62 | Head | Charge Of Store Room | Maryland |
| 30 | Helen Sheets | 60 | Wife | — | Maryland |
| 31 | Roy C Sheets | 66 | Brother | Store Room Clerk | Maryland |
| 32 | Joseph M Davitt | 43 | Head | Cashier | Pennsylvania |
| 33 | Rebecca Davitt | 32 | Wife | — | Maryland |
| 34 | Joseph Davitt | 11 | Son | — | Maryland |
| 35 | Sidney R Peterson | 36 | Head | Educator | Maryland |
| 36 | Rose Peterson | 30 | Wife | — | Maryland |
| 37 | Lorna Peterson | 5 | Daughter | — | Maryland |
| 38 | Judith Peterson | 4 | Daughter | — | Maryland |
| 39 | Portia Davenport | 17 | Maid | Maid | Virginia |
| 40 | Charles Evans | 47 | Head | Clerk | Maryland |
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)