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Mary Hayden — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this Mary Hayden across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1897), then head of a 8-person household.
Age 43
b. ~1897
Female
Spouse
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Hayden |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | E. St Louis |
| 1935 Residence (County) | St Clair |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | E St Louis |
| Est. Birth Year | ~1897 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Irene Hayden | Daughter | — | 7 | ~1933 |
| Richard Hayden | Son | — | 18 | ~1922 |
| Robert Hayden | Son | — | 10 | ~1930 |
| Ruth Hayden | Daughter | — | 13 | ~1927 |
| Marcella Hayden | Daughter | — | 15 | ~1925 |
| Harvey Hayden | Son | — | 19 | ~1921 |
| Arthur Hayden | Head | — | 43 | ~1897 |
| Mary Hayden | Spouse | — | 43 | ~1897 |
Census Appearances
1920
St Clair, …
Spouse, age 22
St Clair, Illinois · implied b. ~1898 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayden |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
St Clair, …
Spouse, age 33
St Clair, Illinois · implied b. ~1897 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayden |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 22 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Clair-County, Illinois
Spouse, age 43
St.-Clair-County, Illinois · implied b. ~1897 — 8 household members
| Surname | Hayden |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | E. St Louis |
| 1935 Residence (County) | St Clair |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Hayden across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Hayden
Spouse · 1940 · age 43 · b. ~1897 · 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 — St.-Clair-County, Illinois
Open full size
1940 US Federal Census — St.-Clair-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00880-00564)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marcella Cradle | 18 | daughter | New Worker | Illinois |
| 2 | Alberta Gillespie | 26 | maid | Maid | Missouri |
| 3 | Edd Berry | 62 | lodger | Salesman | Missouri |
| 5 | Morton Ruston | 57 | Head | Clerk | Indiana |
| 6 | Mildred Ruston | 48 | wife | — | South Dakota |
| 7 | John Watkins | 32 | Head | Shop Supyr | Missouri |
| 8 | Helen Watkins | 30 | wife | — | Illinois |
| 9 | Donald Jan Watkins | 8 | daughter | — | Illinois |
| 10 | Thomas Watkins | 5 | son | — | Illinois |
| 11 | Joan Watkins | 3 | daughter | — | Illinois |
| 12 | David M Ellis | 42 | Head | Clerk | Illinois |
| 13 | David Ellis | 14 | son | — | Illinois |
| 14 | Carrie Ellis | 74 | mother | — | Illinois |
| 15 | Horace Champman | 36 | Head | Operator | Missouri |
| 16 | Marion Champman | 37 | wife | — | Missouri |
| 17 | Horace Jr Champman | 14 | son | — | Missouri |
| 18 | James Champman | 11 | son | — | Missouri |
| 19 | Douglas Williams | 36 | Head | Salesman | Missouri |
| 20 | Marguerite Williams | 34 | wife | — | Missouri |
| 21 | Patricia Williams | 14 | daughter | — | Missouri |
| 22 | Elizabeth Williams | 13 | daughter | — | Missouri |
| 23 | Jeanette Williams | 11 | daughter | — | Missouri |
| 24 | Mary Williams | 6 | daughter | — | Missouri |
| 25 | Fred Myers | 72 | Head | Retired | Indiana |
| 26 | Carrie Myers | 72 | wife | — | Indiana |
| 27 | Burton Fuld | 48 | Head | Switchman | Illinois |
| 28 | Helen Fuld | 45 | wife | — | Indiana |
| 29 | Fred Fuld | 13 | son | — | Illinois |
| 30 | Jane Fuld | 11 | daughter | — | Illinois |
| 31 | Richard Fuld | 8 | son | — | Illinois |
| 32 | William Fuld | 7 | son | — | Illinois |
| 33 | Arthur Hayden | 43 | Head | Inspector | Missouri |
| 34 | Mary Hayden THIS PERSON | 43 | wife | — | Missouri |
| 35 | Harvey Hayden | 19 | son | Elevator Operator | Illinois |
| 36 | Richard Hayden | 18 | son | — | Illinois |
| 37 | Marcella Hayden | 15 | daughter | — | Illinois |
| 38 | Ruth Helen Hayden | 13 | daughter | — | Illinois |
| 39 | Robert Jr Hayden | 10 | son | — | Illinois |
| 40 | Irene Hayden | 7 | daughter | — | Illinois |
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)