MC
Mary Cunningham — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Cunningham across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 9-person household.
Age 49
b. ~1891
Female
Spouse
Born: Nebraska
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Cunningham |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Township / Ward | Chicago |
| Est. Birth Year | ~1891 |
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 |
|---|---|---|---|---|
| Mary Cunningham | Daughter | — | 21 | ~1919 |
| Catherine Cunningham | Daughter | — | 19 | ~1921 |
| Agnes Cunningham | Daughter | — | 17 | ~1923 |
| Frank Cunningham | Head | — | 60 | ~1880 |
| James Cunningham | Son | — | 28 | ~1912 |
| Francis Cunningham | Son | — | 30 | ~1910 |
| Joseph Cunningham | Son | — | 25 | ~1915 |
| George Cunningham | Son | — | 23 | ~1917 |
| Mary Cunningham | Spouse | — | 49 | ~1891 |
Census Appearances
1930
Cook, Illinois
Other, age 39
Cook, Illinois · implied b. ~1891 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cunningham |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Nebraska |
| Age at First Marriage | 18 |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | Northern Ireland |
| Can Read/Write | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
Cook-County, Illinois
Spouse, age 49
Cook-County, Illinois · implied b. ~1891 — 9 household members
| Surname | Cunningham |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Cunningham across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cunningham
Spouse · 1940 · age 49 · b. ~1891 · Illinois
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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
38 people indexed on this census page (nara:1940:m-t0627-00937-00974)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Carlson | 10 | Son | — | Illinois |
| 42 | John B. Carlson | 54 | Head | Auto Mechanic | Sweden |
| 43 | Amelia Carlson | 52 | Wife | — | Sweden |
| 44 | Bernard Carlson | 21 | Son | Apprentice Electrician | Illinois |
| 45 | Gladys Carlson | 18 | Daughter | — | Illinois |
| 46 | Martha Carlson | 16 | Daughter | — | Illinois |
| 47 | James L. Smith | 52 | Head | Paymaster | England |
| 48 | Frances Smith | 52 | Wife | — | Illinois |
| 49 | Herbert Smith | 19 | Son | — | Illinois |
| 50 | Bruce Smith | 16 | Son | — | Illinois |
| 51 | Frank Cunningham | 60 | Head | Motorman | Ireland |
| 52 | Mary Cunningham THIS PERSON | 49 | Wife | — | Nebraska |
| 53 | Francis Cunningham | 30 | Son | Street Car Conductor | Illinois |
| 54 | James Cunningham | 28 | Son | Repairs | Illinois |
| 55 | Joseph Cunningham | 25 | Son | Laborer | Illinois |
| 56 | George Cunningham | 23 | Son | Laborer | Illinois |
| 57 | Mary Cunningham | 21 | Daughter | New Worker | Illinois |
| 58 | Catherine Cunningham | 19 | Daughter | Fountain Waitress | Illinois |
| 59 | Agnes Cunningham | 17 | Daughter | — | Illinois |
| 60 | Walter, Sr. Meagher | 58 | Head | Sales Manager | Illinois |
| 61 | Lola Meagher | 57 | Wife | — | Illinois |
| 62 | Mary Meagher | 18 | Daughter | — | Illinois |
| 63 | Rita Meagher | 17 | Daughter | — | Illinois |
| 64 | Walter Jr. Meagher | 15 | Son | — | Illinois |
| 65 | Loyola Meagher | 4 | Daughter | — | Illinois |
| 66 | Marie Dougherty | 35 | Sister-in-law | Packer & Checker | Illinois |
| 67 | William Welsh | 42 | Head | Owner Manager | Illinois |
| 68 | Marie Welsh | 42 | Wife | — | Illinois |
| 70 | John T. Brooks | 64 | Head | Building Carpenter | Scotland |
| 71 | Amelia Brooks | 59 | Wife | — | Scotland |
| 72 | Clayton Marshall | 26 | Head | Schedule Clerk | Illinois |
| 73 | Kerstin Marshall | 25 | Wife | Beauty Operator | Sweden |
| 74 | Harold Sheppard | 42 | Head | Route Salesman | Illinois |
| 75 | Vivien Sheppard | 36 | Wife | — | Illinois |
| 76 | Patricia Sheppard | 18 | Daughter | — | Illinois |
| 77 | Robert Sheppard | 14 | Son | — | Illinois |
| 78 | William Jordan | 76 | Head | Clerk | Illinois |
| 79 | Mary Jordan | 76 | Wife | File Clerk | 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)