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John Mccoy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lee-County, Illinois
Our Model Tree links this John Mccoy across the 1920, 1930 and 1940 US Censuses in Lee-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 8-person household.
Age 52
b. ~1888
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lee-County, Illinois |
| Surname | McCoy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | East Grove Township |
| 1935 Residence (County) | Lee |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farmer |
| Township / Ward | East Grove Township |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Esther Mccoy | Daughter | — | 10 | ~1930 |
| Alice Mccoy | Daughter | — | 12 | ~1928 |
| Lillian Mccoy | Daughter | — | 15 | ~1925 |
| John Mccoy | Head | — | 52 | ~1888 |
| Ellen Donovans | Other | — | 80 | ~1860 |
| Harry Donovans | Other | — | 14 | ~1926 |
| James Mccoy | Son | — | 19 | ~1921 |
| Alice Mccoy | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Lee, Illinois
Head, age 33
Lee, Illinois · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCoy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Lee, Illinois
Head, age 43
Lee, Illinois · implied b. ~1887
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | McCoy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 31 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Connecticut |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 98 |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lee-County, Illinois
Head, age 52
Lee-County, Illinois · implied b. ~1888 — 8 household members
| Surname | McCoy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | East Grove Township |
| 1935 Residence (County) | Lee |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Highest Grade | No 8 |
| 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 John Mccoy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Mccoy
Head · 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 — Lee-County, Illinois
Open full size
1940 US Federal Census — Lee-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00836-00688)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas L. Elliott | 62 | Head | Laborer | Illinois |
| 42 | Peter Ogan | 56 | Head | Farmer | Illinois |
| 43 | Agusta R. Ogan | 54 | Wife | — | Illinois |
| 44 | Harry Walter | 73 | Brother-in-law | — | Illinois |
| 45 | Pester G. Funderburg | 67 | Head | Farmer | Illinois |
| 46 | Vesta Mae Funderburg | 57 | Wife | — | Illinois |
| 47 | Marjorie Funderburg | 17 | Daughter | — | Illinois |
| 48 | Francis O'Brien | 54 | Head | Farmer | Illinois |
| 49 | Kathryn O'Brien | 56 | Wife | — | Illinois |
| 50 | Daniel O'Brien | 22 | Son | Laborer | Illinois |
| 51 | Walter O'Brien | 20 | Son | Laborer | Illinois |
| 52 | Charles O'Brien | 16 | Son | Laborer | Illinois |
| 53 | Genevieve O'Brien | 14 | Daughter | — | Illinois |
| 54 | William O'Brien | 11 | Son | — | Illinois |
| 55 | John Erickson | 56 | Head | Farmer | Illinois |
| 56 | Matilda Erickson | 43 | Wife | — | Illinois |
| 57 | Russell Erickson | 21 | Son | Laborer | Illinois |
| 58 | Alice Erickson | 17 | Daughter | — | Illinois |
| 59 | John Erickson | 15 | Son | — | Illinois |
| 60 | Arthur Erickson | 13 | Son | — | Illinois |
| 61 | Robert Erickson | 12 | Son | — | Illinois |
| 62 | Minnie Mae Erickson | 11 | Daughter | — | Illinois |
| 63 | Helen Erickson | 8 | Daughter | — | Illinois |
| 64 | Martha Erickson | 3 | Daughter | — | Illinois |
| 65 | Elaine Jean Erickson | 1 | Daughter | — | Illinois |
| 66 | Lester J. Blaine | 23 | Head | Farmer | Illinois |
| 67 | Kathryn Blaine | 22 | Wife | — | Illinois |
| 68 | John Mccoy THIS PERSON | 52 | Head | Farmer | Illinois |
| 69 | Alice Mccoy | 47 | Wife | — | Illinois |
| 70 | James Mccoy | 19 | Son | Laborer | Illinois |
| 71 | Lillian Mccoy | 15 | Daughter | — | Illinois |
| 72 | Alice Kathryn Mccoy | 12 | Daughter | — | Illinois |
| 73 | Esther Mccoy | 10 | Daughter | — | Illinois |
| 74 | Ellen Donovans | 80 | Mother-in-law | — | Illinois |
| 75 | Harry Donovans | 14 | Nephew | — | Illinois |
| 76 | Michael Mcelroy | 75 | Head | — | Ireland |
| 77 | Mary Mcelroy | 58 | Wife | — | Illinois |
| 78 | James Mcelroy | 28 | Son | Farmer | Illinois |
| 79 | Joseph Mcelroy | 24 | Son | Laborer | Illinois |
| 80 | Arthur Mcelroy | 22 | Son | Farmer | 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)