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William Larkin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mclean-County, Illinois
Our Model Tree links this William Larkin across the 1920, 1930 and 1940 US Censuses in Mclean-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Mary — first a son (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mclean-County, Illinois |
| Surname | Larkin |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Money Creek |
| 1935 Residence (County) | McLean |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farmer |
| Township / Ward | Money Creek |
| Est. Birth Year | ~1910 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Lucile Larkin | Daughter | — | 24 | ~1916 |
| Mary Larkin | Head | — | 56 | ~1884 |
| Eugene Larkin | Son | — | 22 | ~1918 |
| William Larkin | Son | — | 30 | ~1910 |
Census Appearances
1920
Mclean, Illinois
Son, age 9
Mclean, Illinois · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkin |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Mclean, Illinois
Son, age 20
Mclean, Illinois · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkin |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | laborer |
| Industry | general farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | no |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Mclean-County, Illinois
Son, age 30
Mclean-County, Illinois · implied b. ~1910 — 4 household members
| Surname | Larkin |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Money Creek |
| 1935 Residence (County) | McLean |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| 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 William Larkin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Larkin (~0.92 confidence) and mother Mary Larkin (~0.92 confidence) and mother Mary Larkin (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Larkin
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Mary Larkin
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Mary Larkin
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Larkin
Son · 1940 · age 30 · b. ~1910 · Illinois
★ You are viewing this record
Sibling
Lucile Larkin
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Larkin
Sibling · 1940 · age 22
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 — Mclean-County, Illinois
Open full size
1940 US Federal Census — Mclean-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00842-00574)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gilbert Deavers | 5 | Son | — | Illinois |
| 42 | Hazel Deavers | 5 | Son | — | Illinois |
| 43 | Rudolph Deavers | 3 | Son | — | Illinois |
| 44 | Ella Flesher | 61 | Mother | — | Illinois |
| 45 | Milton Weakley | 68 | Head | Farmer | Illinois |
| 46 | Rebecca Weakley | 55 | Wife | — | Virginia |
| 47 | Rozella Weakley | 34 | Son | Laborer | Illinois |
| 48 | Clarence Dunkin | 42 | Head | Laborer | Kentucky |
| 49 | Sarah Dunkin | 41 | Wife | — | Kentucky |
| 50 | Howard Dunkin | 15 | Son | — | Illinois |
| 51 | Edna Dunkin | 12 | Daughter | — | Illinois |
| 52 | Virgil Watters | 29 | Head | Laborer W.P.A. | Kentucky |
| 53 | Alice Marie Watters | 26 | Wife | — | Illinois |
| 54 | Leslie Lyle Watters | 9 | Son | — | Illinois |
| 55 | Mabel Hibbs | 52 | Head | Farmer | Illinois |
| 56 | Junior Mcveigh | 20 | Son | Laborer | Illinois |
| 57 | Herman Sigler | 27 | Head | Farmer | Illinois |
| 58 | Bernadine Sigler | 21 | Wife | — | Illinois |
| 59 | Harvey Bell | 43 | Head | Farmer | Illinois |
| 60 | Bertha Bell | 45 | Wife | — | Illinois |
| 61 | Robert Bell | 15 | Son | — | Illinois |
| 62 | Bernard Bell | 12 | Son | — | Illinois |
| 63 | W. J. Harrell | 50 | Head | Farmer | Kentucky |
| 64 | Maude Harrell | 54 | Wife | — | Kentucky |
| 65 | Mabel Harrell | 16 | Daughter | — | Kentucky |
| 66 | Joseph Larkin | 41 | Head | Farmer | Illinois |
| 67 | Agnes Larkin | 29 | Wife | — | Illinois |
| 68 | Forrest Boham | 23 | Head | Laborer | Illinois |
| 69 | Dorothy Boham | 23 | Wife | — | Wisconsin |
| 70 | Jeanne Boham | 2 | Daughter | — | Illinois |
| 71 | Oscar Quinn | 39 | Head | Crane Operator | Indiana |
| 72 | Lillie Mae Quinn | 26 | Wife | — | Illinois |
| 73 | Clarence William Quinn | 3 | Son | — | Illinois |
| 74 | James Oscar Quinn | 1 | Son | — | Illinois |
| 75 | Mary A. Larkin | 56 | Head | Housewife | Illinois |
| 76 | William Larkin THIS PERSON | 30 | Son | Farmer | Illinois |
| 77 | Lucile Larkin | 24 | Daughter | Teacher | Illinois |
| 78 | Eugene Larkin | 22 | Son | — | Illinois |
| 79 | Judson W. Stover | 29 | Head | Farmer | Illinois |
| 80 | Cleo F. Stover | 24 | Wife | — | Illinois |
Pedigree Summary
William + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)