JC
John Coffey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Knox-County, Illinois
Our Model Tree links this John Coffey across the 1920, 1930 and 1940 US Censuses in Knox-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1866), then head of a 5-person household.
Age 74
b. ~1866
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Illinois |
| Surname | Coffey |
| Given Name | John G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Galesburg Township |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Farm |
| Industry | own Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farm |
| Township / Ward | Galesburg Township |
| Est. Birth Year | ~1866 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Anna Rowe | Daughter | — | 37 | ~1903 |
| John Coffey | Son | — | 39 | ~1901 |
| Gertrude Coffey | Daughter | — | 42 | ~1898 |
| John Coffey | Head | — | 74 | ~1866 |
| Everrt Rowe | Other | — | 36 | ~1904 |
Census Appearances
1920
Knox, Illinois
Head, age 54
Knox, Illinois · implied b. ~1866 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coffey |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Farmer |
| Industry | general farm |
| Class of Worker | em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | M |
| Home Free/Mortgaged | F |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Knox, Illinois
Head, age 65
Knox, Illinois · implied b. ~1865 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coffey |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | Southern Ireland |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Knox-County, Illinois
Head, age 74
Knox-County, Illinois · implied b. ~1866 — 5 household members
| Surname | Coffey |
| Given Name | John G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Galesburg Township |
| 1935 Residence (County) | Knox |
| Occupation | Farm |
| Industry | own Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 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 Coffey 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 Coffey
Head · 1940 · age 74 · b. ~1866 · 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 — Knox-County, Illinois
Open full size
1940 US Federal Census — Knox-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00826-01020)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred Mahony | 20 | Niece | — | Illinois |
| 2 | Edward Hallas | 36 | Hired man | Laborer | Illinois |
| 3 | Francis O. Murphy | 50 | Head | — | Illinois |
| 4 | Vesta O. Welch | 45 | Sister in law | Laborer | Kentucky |
| 5 | Bernadine Welch | 18 | Niece | — | Illinois |
| 6 | James Grady | 45 | Head | Farmer | Illinois |
| 7 | Mary A. Grady | 42 | Wife | — | Illinois |
| 8 | James L. Grady | 19 | Son | New Worker | Illinois |
| 9 | Mary L. Grady | 18 | Daughter | — | Illinois |
| 10 | Edward Grady | 13 | Son | — | Illinois |
| 11 | John Grady | 7 | Son | — | Illinois |
| 12 | Edward F. Shay | 53 | Head | Farmer | Illinois |
| 13 | Kathleen Shay | 51 | Wife | — | Illinois |
| 14 | Ruth Shay | 17 | Daughter | — | Illinois |
| 15 | Leo Shay | 26 | Son | Truck Driver | Illinois |
| 16 | Pauline Shay | 19 | Daughter in law | — | Illinois |
| 17 | Lawrence Obermiller | 24 | Hired man | Laborer | Nebraska |
| 18 | Ronald H. Shay | 1 | Grandson | — | Illinois |
| 19 | Oliver Dunton | 35 | Head | Farmer | Illinois |
| 20 | Hattie Dunton | 66 | Mother | — | Illinois |
| 21 | George H. Custer | 63 | Uncle | Laborer | Illinois |
| 22 | Earl G. Posey | 42 | Head | Farmer | Illinois |
| 23 | Delma Posey | 42 | Wife | — | Illinois |
| 24 | Grace Posey | 2 | Daughter | — | Illinois |
| 25 | Dale Tracy | 22 | Head | Farmer | Illinois |
| 26 | Marion Tracy | 20 | Wife | — | Illinois |
| 27 | Connie Tracy | 2 | Daughter | — | Illinois |
| 28 | John G. Coffey THIS PERSON | 74 | Head | Farm | Illinois |
| 29 | Gertrude L. Coffey | 42 | Daughter | — | Illinois |
| 30 | John H. Coffey | 39 | Son | Farm Laborer | Illinois |
| 31 | Everrt Rowe | 36 | Son in law | Salesman | Illinois |
| 32 | Anna Rowe | 37 | Daughter | — | Illinois |
| 33 | Edwin E. Bloomgren | 34 | Head | Laborer | Illinois |
| 34 | Mary Bloomgren | 25 | Wife | — | Illinois |
| 35 | Earl Bloomgren | 3 | Son | — | Illinois |
| 36 | Elizabeth Rice | 66 | Head | — | Illinois |
| 37 | Harry L. Dunn | 44 | Head | Farmer | Illinois |
| 38 | Ivas Dunn | 50 | Wife | — | Illinois |
| 39 | Dorther Dunn | 22 | Daughter | Teacher | Illinois |
| 40 | Harry Rockingham | 62 | Head | 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)