MC
Mary Connors — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-City-County, Missouri
Our Model Tree links this Mary Connors across the 1930 and 1940 US Censuses in St.-Louis-City-County, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 9-person household.
Age 19
b. ~1921
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-City-County, Missouri |
| Surname | Connors |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | St. Louis (City) |
| 1935 Residence (County) | St. Louis City |
| Additional Details | |
| Occupation | Factory Work |
| Industry | Shoe Factory |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 496 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Factory Work |
| Township / Ward | St Louis City |
| Est. Birth Year | ~1921 |
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 |
|---|---|---|---|---|
| Margaret Connors | Spouse | — | 48 | ~1892 |
| Thomas Connors | Daughter | — | 8 | ~1932 |
| Margaret Connors | Daughter | — | 20 | ~1920 |
| Lawrence Connors | Son | — | 13 | ~1927 |
| Joanne Connors | Daughter | — | 3 | ~1937 |
| Mary Connors | Daughter | — | 19 | ~1921 |
| Helen Connors | Daughter | — | 18 | ~1922 |
| Michael Connors | Head | — | 54 | ~1886 |
| Alice Connors | Daughter | — | 16 | ~1924 |
Census Appearances
1930
St Louis, …
Daughter, age 9
St Louis, Missouri · implied b. ~1921 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conners |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Kentucky |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-City-County, Missouri
Daughter, age 19
St.-Louis-City-County, Missouri · implied b. ~1921 — 9 household members
| Surname | Connors |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | St. Louis (City) |
| 1935 Residence (County) | St. Louis City |
| Occupation | Factory Work |
| Industry | Shoe Factory |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 496 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| 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 Connors across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Connors
Daughter · 1940 · age 19 · b. ~1921 · Missouri
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Sibling
Lawrence Connors
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Connors
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joanne Connors
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Connors
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Connors
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Connors
Sibling · 1940 · age 16
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 — St.-Louis-City-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-City-County, Missouri
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-02209-00048)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Wm F. White | 51 | Head | Express Messenger | Missouri |
| 42 | Ina M. White | 42 | Wife | — | Oklahoma |
| 43 | Louise Dobbs | 21 | Daughter | Waitress | Missouri |
| 44 | Rita Lee Dobbs | 4 | Daughter | — | Missouri |
| 46 | Henry E. Gott | 57 | Head | Stationary Engineer | Missouri |
| 47 | Ethel S. Gott | 49 | Wife | Chiropractor | Illinois |
| 48 | Sylvia Wester | 25 | Lodger | Waitress | Missouri |
| 49 | Harry Kalachik | 45 | Head | Owner - Delicatessen | Russia |
| 50 | Jennie Kalachik | 47 | Wife | Help In Delicatessen | Austria |
| 51 | Florence Kalachik | 15 | Daughter | — | Missouri |
| 52 | Eddie Kalachik | 9 | Son | — | Missouri |
| 53 | Evelyn Cosman | 24 | Daughter | Helper In Delic. | Missouri |
| 54 | Albert G. Busick | 50 | Head | Ingraver | Missouri |
| 55 | Eva Louise Busick | 46 | Wife | — | Missouri |
| 56 | Geo. Busick | 23 | Son | Wood Turner | Missouri |
| 57 | Gloria Busick | 14 | Daughter | — | Missouri |
| 58 | Peter Arne | 57 | Head | Tailor | Lithuania |
| 59 | Madeline Arne | 46 | Wife | — | Germany |
| 60 | Michael Connors | 54 | Head | Labor | Irish Free State |
| 61 | Margaret Connors | 48 | Wife | — | Irish Free State |
| 62 | Margaret Connors | 20 | Daughter | Factory Work | Missouri |
| 63 | Mary Connors THIS PERSON | 19 | Daughter | Factory Work | Missouri |
| 64 | Helen Connors | 18 | Daughter | Factory Work | Missouri |
| 65 | Alice Connors | 16 | Daughter | — | Missouri |
| 66 | Lawrence Connors | 13 | Son | — | Missouri |
| 67 | Thomas Connors | 8 | Daughter | — | Missouri |
| 68 | Joanne Connors | 3 | Daughter | — | Missouri |
| 69 | Sam Dien | 25 | Head | Salesman | Russia |
| 70 | Rachel Dien | 64 | Mother | — | Russia |
| 71 | Rose Dien | 22 | Sister | Saleswoman | Russia |
| 72 | Wm. Diekrager | 65 | Head | Clerk | Missouri |
| 73 | Amelia Diekrager | 62 | Wife | — | Missouri |
| 74 | Wm. Morische | 58 | Brother-in-law | Restaurant Worker | Missouri |
| 75 | James Kilkenny | 40 | Head | Foreman | Irish Free State |
| 76 | Mary Kilkenny | 35 | Wife | — | Irish Free State |
| 77 | John Gallagher | 29 | Brother-in-law | Watchman | Irish Free State |
| 78 | W. R. Sr. Blackard | 59 | Head | All Around Work | Illinois |
| 79 | Stella M. Blackard | 59 | Wife | — | Indiana |
| 80 | W. R. Jr. Blackard | 17 | Son | Grocery Clerk | Arkansas |
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)