JG
Joseph Gallagher — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Joseph Gallagher across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Joseph & Mary — first a son (b.~1910), then head of a 5-person household.
Age 30
b. ~1910
Male
Son
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Gallagher |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Janitor |
| Industry | City School |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 740 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Janitor |
| Township / Ward | Chicago |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Marion Gallagher | Son | — | 15 | ~1925 |
| Mary Gallagher | Spouse | — | 60 | ~1880 |
| John Gallagher | Son | — | 33 | ~1907 |
| Joseph Gallagher | Son | — | 30 | ~1910 |
| Joseph Gallagher | Head | — | 62 | ~1878 |
Census Appearances
1920
Macoupin, Illinois
Son, age 12
Macoupin, Illinois · implied b. ~1908 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gallagher |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1912 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1909 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gallagher |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1911 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Janitor |
| Industry | School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Cook-County, Illinois
Son, age 30
Cook-County, Illinois · implied b. ~1910 — 5 household members
| Surname | Gallagher |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Janitor |
| Industry | City School |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 740 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Joseph Gallagher across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Joseph Gallagher (~0.92 confidence) and mother Mary Gallagher (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Gallagher
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Mary Gallagher
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Gallagher
Son · 1940 · age 30 · b. ~1910 · Illinois
★ You are viewing this record
Sibling
John Gallagher
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Gallagher
Sibling · 1940 · age 15
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00937-01015)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alice Means | 75 | Lodger | — | Illinois |
| 2 | Paul Froehner | 55 | Head | Clerk | Germany |
| 3 | Johanna Froehner | 52 | Wife | Housekeeper | Germany |
| 4 | Pauline Froehner | 15 | Daughter | — | Illinois |
| 5 | Eleanor Froehner | 13 | Daughter | — | Illinois |
| 6 | Joseph C. Spence | 35 | Head | Operator | Penn. |
| 7 | Evaline Spence | 22 | Wife | — | Indiana |
| 8 | Joseph R. Spence | 4 | Son | — | Illinois |
| 9 | Millicent Spence | 2 | Daughter | — | Illinois |
| 10 | John Miller | 63 | Head | Accountant | Iowa |
| 11 | Clara B. Miller | 55 | Wife | — | Illinois |
| 12 | Clara W. Miller | 20 | Daughter | — | Illinois |
| 13 | Norman Nottingham | 43 | Head | Police Officer | Illinois |
| 14 | Myrtle Blackledge | 61 | Housekeeper | — | Illinois |
| 15 | Carl J. Uhl | 24 | Head | Truck Driver | Illinois |
| 16 | Ires Uhl | 23 | Wife | — | Iowa |
| 17 | Ronald Uhl | 2 | Son | — | Illinois |
| 18 | Jack R. Uhl | 13 | Brother | — | Illinois |
| 19 | Joseph Gallagher | 62 | Head | Janitor | Scotland |
| 20 | Mary Gallagher | 60 | Wife | — | Scotland |
| 21 | John J. Gallagher | 33 | Son | — | Scotland |
| 22 | Joseph Gallagher THIS PERSON | 30 | Son | Janitor | Scotland |
| 23 | Marion Gallagher | 15 | Son | — | Illinois |
| 24 | Albert M. Booth | 53 | Head | Police Officer | Illinois |
| 25 | Elizabeth Booth | 52 | Wife | — | Illinois |
| 26 | Marvin A. Booth | 21 | Son | Maintenance | Illinois |
| 27 | Willard Booth | 18 | Son | — | Illinois |
| 28 | Betty Booth | 13 | Daughter | — | Illinois |
| 29 | Earnest Rhodes | 57 | Head | Piano Tuner | Kentucky |
| 30 | Jessie Rhodes | 55 | Wife | — | Indiana |
| 31 | George Leahy | 50 | Head | Mail Man | Illinois |
| 32 | Blandine Leahy | 45 | Wife | — | Illinois |
| 33 | Philip Leahy | 17 | Son | — | Illinois |
| 34 | John Leahy | 15 | Son | — | Illinois |
| 35 | Eugene Leahy | 12 | Son | — | Illinois |
| 36 | Andrew Leahy | 6 | Son | — | Illinois |
| 37 | Bridget Mckenna | 76 | Mother-in-law | — | Ireland |
| 38 | Stanley Baker | 62 | Head | Upholsterer | Germany |
| 39 | Minnie Baker | 59 | Wife | — | Illinois |
| 40 | Arthur Benson | 39 | Head | Special Delivery | Illinois |
Related Census Records
Pedigree Summary
Joseph + 2 siblings
Gen 1 · 2 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)