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John Maher — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Madison-County, Illinois
Our Model Tree links this John Maher across the 1930 and 1940 US Censuses in Madison-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1904), then head of a 7-person household.
Age 36
b. ~1904
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Illinois |
| Surname | Maher |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Occupation | Welder |
| Industry | Ill. Glass |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | H 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Welder |
| Township / Ward | Godfrey T |
| Est. Birth Year | ~1904 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Kathleen Maher | Daughter | — | 4 | ~1936 |
| Sally Maher | Daughter | — | 6 | ~1934 |
| John Maher | Son | — | 13 | ~1927 |
| Anthony Maher | Son | — | 2 | ~1938 |
| John Maher | Head | — | 36 | ~1904 |
| Margaret Maher | Daughter | — | 10 | ~1930 |
| Margaret Maher | Spouse | — | 33 | ~1907 |
Census Appearances
1930
Madison, Illinois
Head, age 26
Madison, Illinois · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maher |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 23 |
| Father's Birthplace | N. Ireland |
| Mother's Birthplace | N. Ireland |
| Occupation | Pipe fitter |
| Industry | Steel Mfg Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25.00 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Madison-County, Illinois
Head, age 36
Madison-County, Illinois · implied b. ~1904 — 7 household members
| Surname | Maher |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton |
| 1935 Residence (County) | Madison |
| Occupation | Welder |
| Industry | Ill. Glass |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | H 4 |
| 1935 Residence | Illinois |
| 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 Maher across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Maher
Head · 1940 · age 36 · b. ~1904 · 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 — Madison-County, Illinois
Open full size
1940 US Federal Census — Madison-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00849-00831)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward A. Sagemann | 66 | Head | Retired | Illinois |
| 2 | Louise B. Sagemann | 58 | Wife | House Keeper | Illinois |
| 3 | Harold B. Sagemann | 30 | Son | Blue Print | Illinois |
| 4 | Betty Lou Sagemann | 8 | Granddaughter | — | Illinois |
| 5 | Jill Lee Sagemann | 4 | Granddaughter | — | Illinois |
| 6 | Olin Sagemann | 28 | Head | Helper | Illinois |
| 7 | Barbara Sagemann | 26 | Wife | House Keeper | Missouri |
| 8 | Stanley Sagemann | 8 | Son | — | Illinois |
| 9 | John J. Staka | 33 | Head | Machinist | Illinois |
| 10 | Ruth D. Staka | 27 | Wife | House Keeper | Illinois |
| 11 | Regina Staka | 1 | Daughter | — | Illinois |
| 12 | Edwin Cordes | 52 | Head | Manager | Missouri |
| 13 | Emma P. Cordes | 43 | Wife | House Keeper | Missouri |
| 14 | Davis Davis | 14 | Daughter | — | Illinois |
| 15 | Louis Stracke | 27 | Head | Packer | Illinois |
| 16 | Hazel Stracke | 25 | Wife | Packer | Illinois |
| 17 | Opal Hancock | 36 | House Keeper | House Keeper | Illinois |
| 18 | George Brigel | 33 | Head | Salesman | Illinois |
| 19 | Lillian D. Brigel | 30 | Wife | House Keeper | Illinois |
| 20 | Louis Dunnigan | 28 | Head | Station Attendant | Missouri |
| 21 | Isabel G. Dunnigan | 23 | Wife | House Keeper | Missouri |
| 22 | Robert Dunnigan | 2 | Son | — | Illinois |
| 23 | Albert Dunnigan | 0 | Son | — | Illinois |
| 24 | John Maher THIS PERSON | 36 | Head | Welder | Illinois |
| 25 | Margaret A. Maher | 33 | Wife | House Keeper | Illinois |
| 26 | John E. Maher | 13 | Son | — | Illinois |
| 27 | Margaret J. Maher | 10 | Daughter | — | Illinois |
| 28 | Sally J. Maher | 6 | Daughter | — | Illinois |
| 29 | Kathleen Maher | 4 | Daughter | — | Illinois |
| 30 | Anthony Maher | 2 | Son | — | Illinois |
| 31 | Howard Colburn | 31 | Head | Bookkeeper | Illinois |
| 32 | Evelyn Colburn | 24 | Wife | House Keeper | Illinois |
| 33 | Daniel Colburn | 2 | Son | — | Illinois |
| 34 | Lyndal Colburn | 0 | Son | — | Illinois |
| 35 | Harold G. Cordes | 34 | Head | Filling Station | Missouri |
| 36 | Marion Cordes | 32 | Wife | House Keeper | Illinois |
| 37 | Edwin Cordes | 2 | Son | — | Illinois |
| 38 | H. Earl O'Hara | 38 | Head | Ad. Director | Texas |
| 39 | Caroline D. O'Hara | 35 | Wife | Printing Dept. | Missouri |
| 40 | Richard O'Hara | 14 | Son | — | Oklahoma |
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)