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Mary Baird — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-City-County, Missouri
Our Model Tree links this Mary Baird across the 1930 and 1940 US Censuses in St.-Louis-City-County, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 7-person household.
Age 11
b. ~1929
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-City-County, Missouri |
| Surname | Baird |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (County) | St. Louis City |
| Additional Details | |
| Highest Grade | Yes 5 |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | St Louis City |
| Est. Birth Year | ~1929 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Sanford Baird | Head | — | 33 | ~1907 |
| Mary Baird | Daughter | — | 11 | ~1929 |
| Ronald Baird | Son | — | 2 | ~1938 |
| Mary Baird | Spouse | — | 29 | ~1911 |
| John Baird | Son | — | 5 | ~1935 |
| Kirby Baird | Son | — | 17 | ~1923 |
| James Baird | Son | — | 10 | ~1930 |
Census Appearances
1930
St Louis, …
Daughter, age 1
St Louis, Missouri · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baird |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-City-County, Missouri
Daughter, age 11
St.-Louis-City-County, Missouri · implied b. ~1929 — 7 household members
| Surname | Baird |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (County) | St. Louis City |
| Highest Grade | Yes 5 |
| 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 Baird across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Baird
Daughter · 1940 · age 11 · b. ~1929 · Missouri
★ You are viewing this record
Sibling
James Baird
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kirby Baird
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ronald Baird
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Baird
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 — St.-Louis-City-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-City-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02198-00452)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Katherine Plastill | 0 | Daughter | — | Missouri |
| 42 | Thomas F. Cahill | 54 | Head | Shoe Factory | Missouri |
| 43 | James P. Cahill | 53 | Brother | Court House | Missouri |
| 44 | Charles W. Johnson | 36 | Head | 70 | Missouri |
| 45 | Eva F. Johnson | 37 | Wife | — | Missouri |
| 46 | Mabel E. Johnson | 14 | Daughter | — | Missouri |
| 47 | Betty J. Johnson | 8 | Daughter | — | Missouri |
| 48 | Anna Hunt | 42 | Head | Sewing Project | Missouri |
| 49 | Frances L. Hunt | 17 | Daughter | — | Missouri |
| 50 | Robert Ferguson | 24 | Son-in-law | — | Missouri |
| 51 | Juanita P. Ferguson | 28 | Daughter | — | Missouri |
| 52 | Vernon E. Schardt | 30 | Head | Hotel | Arkansas |
| 53 | Alice M. Schardt | 27 | Wife | — | Missouri |
| 54 | Vernon C. Schardt | 2 | Son | — | Missouri |
| 55 | John Boliance | 31 | Head | Hotel | Missouri |
| 56 | Mary V. Boliance | 28 | Wife | — | Missouri |
| 57 | Charlotte Boliance | 10 | Daughter | — | Missouri |
| 58 | Ruth M. Boliance | 8 | Daughter | — | Missouri |
| 59 | Lawrence M. Whitmore | 29 | Head | Lumber | Missouri |
| 60 | Virginia V. Whitmore | 24 | Wife | Shoe Factory | Missouri |
| 61 | Joyce L. Housewright | 10 | Daughter | — | Missouri |
| 62 | Jerry N. Housewright | 8 | Step-son | — | Missouri |
| 63 | Jean S. Housewright | 7 | Step-daughter | — | Missouri |
| 64 | Thomas Sterling | 3 | Lodger | — | Missouri |
| 65 | William Sterling | 0 | Lodger | — | Missouri |
| 66 | Sanford L. Baird | 33 | Head | Recorder Of Deeds Project | Missouri |
| 67 | Mary E. Baird | 29 | Wife | — | Missouri |
| 68 | Kirby Baird | 17 | Son | — | Missouri |
| 69 | Mary J. Baird THIS PERSON | 11 | Daughter | — | Missouri |
| 70 | James D. Baird | 10 | Son | — | Missouri |
| 71 | John E. Baird | 5 | Son | — | Missouri |
| 72 | Ronald L. Baird | 2 | Son | — | Missouri |
| 73 | Effie E. Reddick | 42 | Head | Department Store Cafe | Tennessee |
| 74 | John W. Cone | 21 | Son | — | Tennessee |
| 75 | Susie K. Cone | 18 | Daughter | Auto Parts Factory | Tennessee |
| 76 | Benjamin F. Cone | 17 | Son | — | Tennessee |
| 77 | Sidney Whittle | 66 | Father | — | Kentucky |
| 78 | Christopher J. Gray | 58 | Head | — | Missouri |
| 79 | Robert F. Gray | 25 | Son | Forestry Project | Missouri |
| 80 | Walter Duffy | 56 | Lodger | Road Construction | Missouri |
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)