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Mary Baird — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Illinois
Our Model Tree links this Mary Baird across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 3-person household.
Age 49
b. ~1891
Female
Spouse
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Illinois |
| Surname | Baird |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Litchfield |
| 1935 Residence (County) | Montgomery |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | Litchfield |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Robert Baird | Son | — | 12 | ~1928 |
| Robert Baird | Head | — | 62 | ~1878 |
| Mary Baird | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Montgomery, Illinois
Spouse, age 30
Montgomery, Illinois · implied b. ~1890 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baird |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1911 |
| Naturalization Status | Alien |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Montgomery, Illinois
Spouse, age 40
Montgomery, Illinois · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baird |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1909 |
| Age at First Marriage | 19 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Montgomery-County, Illinois
Spouse, age 49
Montgomery-County, Illinois · implied b. ~1891 — 3 household members
| Surname | Baird |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Litchfield |
| 1935 Residence (County) | Montgomery |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Baird
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 — Montgomery-County, Illinois
Open full size
1940 US Federal Census — Montgomery-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00860-00582)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clarence Bourke | 2 | Son | — | Illinois |
| 42 | Alice Marquis | 56 | Head | — | England |
| 43 | Benjamin Marquis | 32 | Son | Painting | England |
| 44 | Samuel Bogle | 58 | Head | Miner | Scotland |
| 45 | Mary Bogle | 53 | Wife | — | Scotland |
| 46 | Clifford Larson | 38 | Head | State Investigator | Iowa |
| 47 | Ruth Larson | 33 | Wife | — | Minnesota |
| 48 | Catherine Larson | 8 | Daughter | — | Illinois |
| 49 | William Morgan | 30 | Head | Miner | Pennsylvania |
| 50 | Ann Morgan | 28 | Sister | — | Pennsylvania |
| 51 | Robert Baird | 62 | Head | Miner | Scotland |
| 52 | Mary Baird THIS PERSON | 49 | Wife | — | Scotland |
| 53 | Robert Baird | 12 | Son | — | Illinois |
| 54 | Mike Popovich | 52 | Head | Miner | Slovakia |
| 55 | Katherine Popovich | 45 | Wife | — | Pennsylvania |
| 56 | John Popovich | 20 | Son | Laborer | Illinois |
| 57 | William Popovich | 14 | Son | — | Illinois |
| 58 | John Lucatsh | 52 | Head | Miner | Slovakia |
| 59 | Mary Lucatsh | 52 | Wife | — | Slovakia |
| 60 | Noel Prilley | 29 | Head | Miner | Illinois |
| 61 | Ione Prilley | 28 | Wife | — | Illinois |
| 62 | Ronald Prilley | 5 | Son | — | Illinois |
| 63 | Henry B. Reid | 35 | Head | Section Laborer | Illinois |
| 64 | Mabel Reid | 44 | Wife | — | England |
| 65 | Enoch Jones | 79 | Father-in-law | — | England |
| 66 | Jabice Jones | 67 | Uncle | — | England |
| 67 | Leslie Davis | 31 | Head | Miner | Illinois |
| 68 | Vivian Davis | 27 | Wife | — | Illinois |
| 69 | Judith L. Davis | 4 | Daughter | — | Michigan |
| 70 | Jesse Shelton | 46 | Head | Miner | Illinois |
| 71 | Anita Shelton | 36 | Wife | — | Illinois |
| 72 | Lois Shelton | 5 | Son | — | Illinois |
| 73 | Shirley A. Shelton | 4 | Daughter | — | Illinois |
| 74 | Kathleen Shelton | 2 | Daughter | — | Illinois |
| 75 | Darlene Shelton | None | Daughter | — | Illinois |
| 76 | Lena Smith | 56 | Head | — | Illinois |
| 77 | Paul Smith | 19 | Son | New Worker | Illinois |
| 78 | Neil Berry | 69 | Head | — | Sweden |
| 79 | Alice Conlon | 66 | Head | — | Kansas |
| 80 | Vivian Conlon | 29 | Daughter | New Worker | 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)