MZ
Mary Zimmerman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hamilton-County, Ohio
Our Model Tree links this Mary Zimmerman across the 1930 and 1940 US Censuses in Hamilton-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 9-person household.
Age 20
b. ~1920
Female
Daughter
Born: Alabama
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Ohio |
| Surname | Zimmerman |
| Given Name | Mary S |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | Cincinnati |
| Est. Birth Year | ~1920 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ethel Zimmerman | Daughter | — | 16 | ~1924 |
| Catherine Zimmerman | Daughter | — | 18 | ~1922 |
| Helen Zimmerman | Daughter | — | 7 | ~1933 |
| Mary Zimmerman | Daughter | — | 20 | ~1920 |
| Theodore Zimmerman | Daughter | — | 5 | ~1935 |
| Oliver Zimmerman | Daughter | — | 10 | ~1930 |
| Jannie Zimmerman | Daughter | — | 12 | ~1928 |
| Annie Zimmerman | Head | — | 40 | ~1900 |
| Arthur Zimmerman | Son | — | 14 | ~1926 |
Census Appearances
1930
Hamilton, Ohio
Daughter, age 10
Hamilton, Ohio · implied b. ~1920 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Can Read/Write | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Hamilton-County, Ohio
Daughter, age 20
Hamilton-County, Ohio · implied b. ~1920 — 9 household members
| Surname | Zimmerman |
| Given Name | Mary S |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 Mary Zimmerman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Zimmerman
Daughter · 1940 · age 20 · b. ~1920 · Ohio
★ You are viewing this record
Sibling
Catherine Zimmerman
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jannie Zimmerman
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Zimmerman
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Zimmerman
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Oliver Zimmerman
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Zimmerman
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theodore Zimmerman
Sibling · 1940 · age 5
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 — Hamilton-County, Ohio
Open full size
1940 US Federal Census — Hamilton-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03198-00152)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jeff Thompson | 44 | Head | Labor | Alabama |
| 42 | Nellie Thompson | 43 | Wife | — | Alabama |
| 43 | Gerard Thompson | 12 | Son | — | Ohio |
| 44 | Annie Zimmerman | 40 | Head | Cook | Alabama |
| 45 | Mary S Zimmerman THIS PERSON | 20 | Daughter | — | Alabama |
| 46 | Catherine Zimmerman | 18 | Daughter | Idle Chase | Alabama |
| 47 | Ethel Lee Zimmerman | 16 | Daughter | Idle Chase | Alabama |
| 48 | Arthur W Zimmerman | 14 | Son | Other | Ohio |
| 49 | Jannie D Zimmerman | 12 | Daughter | — | Ohio |
| 50 | Oliver J Zimmerman | 10 | Daughter | — | Ohio |
| 51 | Helen Zimmerman | 7 | Daughter | — | Ohio |
| 52 | Theodore Zimmerman | 5 | Daughter | — | Ohio |
| 53 | Robert Davis | 43 | Head | — | Georgia |
| 54 | Bertha Davis | 39 | Wife | Labor | N.C. |
| 55 | Mary Black | 72 | Mother | Maid | N.C. |
| 56 | Ben F Vandose | 41 | Head | Oap | S.C. |
| 57 | Calsie Vandose | 38 | Wife | — | Georgia |
| 58 | Jerry Waller | 43 | Head | Labor | Georgia |
| 59 | Dorothia Waller | 21 | Daughter | Maid | Illinois |
| 60 | Melvinia Waller | 5 | Daughter | — | Ohio |
| 61 | Grace Waller | 40 | Sister | — | Georgia |
| 62 | Janie Mason | 28 | Lodger | Cook | Ohio |
| 63 | Mary Mason | 10 | Lodger | — | Ohio |
| 64 | Ben Donaldson | 42 | Head | Fireman | Georgia |
| 65 | Grace Donaldson | 39 | Wife | — | Georgia |
| 66 | Lucile Donaldson | 14 | Daughter | — | Ohio |
| 67 | Rubin Coleman | 38 | Head | Labor | Georgia |
| 68 | Selma Coleman | 35 | Wife | Laundress | Georgia |
| 69 | James Robinson | 16 | Lodger | — | Georgia |
| 70 | Thomas Wright | 29 | Head | Bus Boy | Georgia |
| 71 | Gladys Wright | 21 | Wife | — | Georgia |
| 72 | Shirley Ann Wright | 1 | Daughter | — | Ohio |
| 73 | Eddie Johnston | 38 | Head | Labor | Georgia |
| 74 | Alma Johnston | 37 | Wife | Glass Wash | Alabama |
| 75 | John S Johnston | 15 | Son | — | Ohio |
| 76 | Alfred Mark | 39 | Head | Contractor | Tenn |
| 77 | Mildred Mark | 26 | Wife | — | Ohio |
| 78 | Betty J Mark | 1 | Daughter | — | Ohio |
| 79 | Jasper Williams | 36 | Head | Laborer | Alabama |
| 80 | Chas Williams | 11 | Son | — | Ohio |
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)