MS
Mary Shields — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mchenry-County, Illinois
Our Model Tree links this Mary Shields across the 1930 and 1940 US Censuses in Mchenry-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 9-person household.
Age 52
b. ~1888
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mchenry-County, Illinois |
| Surname | Shields |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Hebron Twp |
| 1935 Residence (County) | McHenry |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Hebron Twp |
| Est. Birth Year | ~1888 |
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 |
|---|---|---|---|---|
| Daniel Shields | Son | — | 22 | ~1918 |
| Raymond Shields | Son | — | 20 | ~1920 |
| Blanche Shields | Daughter | — | 11 | ~1929 |
| Robert Shields | Son | — | 17 | ~1923 |
| Marie Shields | Daughter | — | 13 | ~1927 |
| Edmund Shields | Son | — | 24 | ~1916 |
| Joseph Shields | Son | — | 26 | ~1914 |
| Daniel Shields | Head | — | 57 | ~1883 |
| Mary Shields | Spouse | — | 52 | ~1888 |
Census Appearances
1930
Mchenry, Illinois
Other, age 42
Mchenry, Illinois · implied b. ~1888 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shields |
| Given Name | Mary E |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 24 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Mchenry-County, Illinois
Spouse, age 52
Mchenry-County, Illinois · implied b. ~1888 — 9 household members
| Surname | Shields |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Hebron Twp |
| 1935 Residence (County) | McHenry |
| Industry | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Shields across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Shields
Spouse · 1940 · age 52 · b. ~1888 · 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 — Mchenry-County, Illinois
Open full size
1940 US Federal Census — Mchenry-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00840-00803)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frances Marzahl | 19 | Wife | — | Wisconsin |
| 42 | Llewellyn Begun | 40 | Head | Farmer | Illinois |
| 43 | Luella M Begun | 34 | Wife | — | Illinois |
| 44 | Marilyn J Begun | 5 | Daughter | — | Illinois |
| 45 | Irving J Begun | 71 | Father | — | Illinois |
| 46 | Victor Nelson | 68 | Head | Farm Labor | Sweden |
| 47 | Alvida L Nelson | 62 | Wife | Farmer | Sweden |
| 48 | William Riley | 30 | Hired man | Farm Labor | Wisconsin |
| 49 | John Illingworth | 36 | Head | Farmer | Germany |
| 50 | Zelma M Illingworth | 30 | Wife | — | Germany |
| 51 | James E Illingworth | 4 | Son | — | Illinois |
| 52 | Dinia M Illingworth | 2 | Daughter | — | Illinois |
| 53 | John H Illingworth | 0 | Son | — | Illinois |
| 54 | James A Hallisy | 31 | Head | Farmer | Illinois |
| 55 | Anna J Hallisy | 27 | Wife | — | Illinois |
| 56 | James F Jr Hallisy | 3 | Son | — | Illinois |
| 57 | Urban Eichman | 20 | Hired man | Farm Labor | Illinois |
| 58 | Alice Tabor | 53 | Head | Farm Labor | Ireland |
| 59 | Thomas J Tabor | 24 | Son | Farm Labor | Illinois |
| 60 | Ernest Peternick | 28 | Hired man | Farmer | Illinois |
| 61 | Harry D Burke | 42 | Head | Farmer | Illinois |
| 62 | Rosary M Burke | 18 | Daughter | — | Illinois |
| 63 | Joan A Burke | 16 | Daughter | — | Illinois |
| 64 | Dan H Burke | 14 | Son | — | Illinois |
| 65 | Harry Weismann | 39 | Hired man | House Keeper | Denmark |
| 66 | Paul Burke | 22 | Hired man | Farm Labor | Illinois |
| 67 | John D Vandell | 31 | Head | Farmer | Missouri |
| 68 | Lucille J Vandell | 26 | Wife | — | Missouri |
| 69 | Bettie Lou Vandell | 10 | Daughter | — | Oklahoma |
| 70 | Lonnie J Vandell | 8 | Son | — | Oklahoma |
| 71 | Daniel Shields | 57 | Head | Farmer | Illinois |
| 72 | Mary E Shields THIS PERSON | 52 | Wife | — | Illinois |
| 73 | Joseph A Shields | 26 | Son | Farm Labor | Illinois |
| 74 | Edmund J Shields | 24 | Son | Farm Labor | Illinois |
| 75 | Daniel Jr Shields | 22 | Son | Farm Labor | Illinois |
| 76 | Raymond M Shields | 20 | Son | Farm Labor | Illinois |
| 77 | Robert D Shields | 17 | Son | — | Illinois |
| 78 | Marie A Shields | 13 | Daughter | — | Illinois |
| 79 | Blanche C Shields | 11 | Daughter | — | Illinois |
| 80 | H. Slovin Tester | 70 | Head | — | 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)