MC
Mary Cummings — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Cummings across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1912), then head of a 9-person household.
Age 28
b. ~1912
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Cummings |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Clerk |
| Industry | Mail order house |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerk |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1912 |
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 |
|---|---|---|---|---|
| Genevieve Cummings | Daughter | — | 27 | ~1913 |
| Germaine Cummings | Daughter | — | 17 | ~1923 |
| Rita Cummings | Daughter | — | 17 | ~1923 |
| Mary Cummings | Daughter | — | 28 | ~1912 |
| Kathleen Cummings | Daughter | — | 24 | ~1916 |
| James Cummings | Head | — | 64 | ~1876 |
| Lawrence Cummings | Son | — | 20 | ~1920 |
| James Cummings | Son | — | 22 | ~1918 |
| Anna Cummings | Spouse | — | 60 | ~1880 |
Census Appearances
1930
Cook, Illinois
Daughter, age 18
Cook, Illinois · implied b. ~1912 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cumming |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Occupation | Stenographer |
| Industry | Clothing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 28
Cook-County, Illinois · implied b. ~1912 — 9 household members
| Surname | Cummings |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Occupation | Clerk |
| Industry | Mail order house |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Cummings across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cummings
Daughter · 1940 · age 28 · b. ~1912 · Illinois
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Sibling
Germaine Cummings
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Cummings
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cummings
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Cummings
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Genevieve Cummings
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Cummings
Sibling · 1940 · age 17
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01000-00106)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George A. Ralph | 8 | Nephew | — | Illinois |
| 2 | James Cummings | 64 | Head | Motorman | Pennsylvania |
| 3 | Anna Cummings | 60 | Wife | — | Illinois |
| 4 | Mary Cummings THIS PERSON | 28 | Daughter | Clerk | Illinois |
| 5 | Genevieve Cummings | 27 | Daughter | Clerk & Typist | Illinois |
| 6 | Kathleen Cummings | 24 | Daughter | File Clerk | Illinois |
| 7 | James Cummings | 22 | Son | Truck Driver | Illinois |
| 8 | Lawrence Cummings | 20 | Son | Grocery Clerk | Illinois |
| 9 | Rita Cummings | 17 | Daughter | — | Illinois |
| 10 | Germaine Cummings | 17 | Daughter | — | Illinois |
| 11 | George Peterson | 64 | Head | Sheet Metal Worker | Sweden |
| 12 | Russell Thompson | 32 | Son-in-law | Salesman | Illinois |
| 13 | Lillian Thompson | 32 | Daughter | — | Illinois |
| 14 | Dennis Thompson | 4 | Grandson | — | Illinois |
| 15 | Edward Johnson | 64 | Head | Grocery Clerk | Sweden |
| 16 | Ida Johnson | 58 | Wife | — | Sweden |
| 17 | Edna Johnson | 37 | Daughter | — | Illinois |
| 18 | Oscar Johnson | 34 | Head | Construction Maintenance | Illinois |
| 19 | Annamarie Johnson | 32 | Wife | — | Illinois |
| 20 | Marie Sally Johnson | 2 | Daughter | — | Illinois |
| 21 | John Schwer | 47 | Head | Tool & Die Maker | Wisconsin |
| 22 | Emma Schwer | 40 | Wife | — | Illinois |
| 23 | Howard Schwer | 19 | Son | Order Filler | Illinois |
| 24 | Ralph Schwer | 18 | Son | Mechanist | Illinois |
| 25 | Lloyd Schwer | 12 | Son | — | Illinois |
| 26 | Oscar Anderson | 36 | Head | Clergy & Social Worker | Nebraska |
| 27 | Esther Anderson | 30 | Wife | Clergy & Social Worker | Iowa |
| 28 | Marilyn Anderson | 6 | Daughter | — | Iowa |
| 29 | Morris Anderson | 1 | Son | — | Minnesota |
| 30 | Otto Bengel | 49 | Head | Tool & Die Maker | Germany |
| 31 | Hedwig Bengel | 42 | Wife | — | Germany |
| 32 | Dolores Bengel | 10 | Daughter | — | Michigan |
| 33 | Elaine Bengel | 5 | Daughter | — | Illinois |
| 34 | Theodore Bengel | 1 | Son | — | Illinois |
| 35 | Arthur Saxton | 48 | Lodger | Telephone Collector | Illinois |
| 36 | William Snyder | 63 | Head | House Painter | Illinois |
| 37 | Clara Snyder | 63 | Wife | — | Germany |
| 38 | Louise Snyder | 20 | Daughter | Dice Girl | Illinois |
| 39 | Edward Benson | 45 | Head | Conductor | Illinois |
| 40 | Benson | 45 | Wife | — | Illinois |
Related Census Records
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)