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Harold Walker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Harold Walker across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 10-person household.
Age 21
b. ~1919
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Walker |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | River Grove |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | River Grove |
| Est. Birth Year | ~1919 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Harold Walker | Son | — | 21 | ~1919 |
| James Walker | Son | — | 26 | ~1914 |
| Thomas Walker | Son | — | 12 | ~1928 |
| Fenton Walker | Head | — | 54 | ~1886 |
| Raymond Walker | Son | — | 24 | ~1916 |
| Mary Walker | Spouse | — | 47 | ~1893 |
| Anna Walker | Daughter | — | 17 | ~1923 |
| Richard Walker | Son | — | 8 | ~1932 |
| John Walker | Son | — | 14 | ~1926 |
| Ethel Walker | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Cook, Illinois
Son, age 10
Cook, Illinois · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Walker |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 21
Cook-County, Illinois · implied b. ~1919 — 10 household members
| Surname | Walker |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | River Grove |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| 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 Harold Walker across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Harold Walker
Son · 1940 · age 21 · b. ~1919 · Illinois
★ You are viewing this record
Sibling
Thomas Walker
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Walker
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Walker
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Walker
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Walker
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Walker
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Walker
Sibling · 1940 · age 8
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-t0627-00780-00927)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William M Kalb | 33 | Head | — | Illinois |
| 42 | Thomas Spearing | 30 | Head | Foreman | England |
| 43 | Anna Spearing | 26 | Wife | — | Ohio |
| 44 | Oliver Roark | 27 | Head | Foreman | Michigan |
| 45 | Hildegarde Roark | 27 | Wife | — | Michigan |
| 46 | Kenneth Roark | 3 | Son | — | — |
| 47 | Barbara Roark | 1 | Daughter | — | — |
| 48 | Harvey O'Connell | 49 | Head | — | Missouri |
| 49 | Walter De Costa | 31 | Son-in-law | Salesman | Illinois |
| 50 | Bernice De Costa | 29 | Daughter | Secretary | Illinois |
| 51 | Jeanette O'Donnell | 14 | Daughter | — | Illinois |
| 52 | Joseph Powell | 30 | Head | Production Man | Illinois |
| 53 | Gertrude Powell | 25 | Wife | — | Illinois |
| 54 | Joan Powell | 5 | Daughter | — | — |
| 55 | Katherine Roelle | 53 | Mother | — | Illinois |
| 56 | George De Costa | 36 | Head | Salesman | Illinois |
| 57 | Margaret De Costa | 36 | Wife | — | Illinois |
| 58 | Donald De Costa | 11 | Son | — | Illinois |
| 59 | Raymond De Costa | 8 | Son | — | Illinois |
| 60 | Katherine Klein | 61 | Mother-in-law | — | Illinois |
| 61 | James Furlong | 54 | Head | Maintenance Man | Illinois |
| 62 | Ella Furlong | 54 | Wife | — | Illinois |
| 63 | Mary C Furlong | 27 | Daughter | File Clerk | Illinois |
| 64 | James B Furlong | 25 | Son | Maintenance Man | Illinois |
| 65 | Robert Furlong | 20 | Son | Helper On Oil | Illinois |
| 66 | Gerald Furlong | 17 | Son | — | Illinois |
| 67 | Fenton Walker | 54 | Head | Electrician | England |
| 68 | Mary Walker | 47 | Wife | — | Ireland |
| 69 | James Walker | 26 | Son | Radio Service | Illinois |
| 70 | Raymond Walker | 24 | Son | Waiter | Illinois |
| 71 | Harold Walker THIS PERSON | 21 | Son | — | Illinois |
| 72 | Ethel Rita Walker | 18 | Daughter | — | Illinois |
| 73 | Anna Celia Walker | 17 | Daughter | — | Illinois |
| 74 | John J Walker | 14 | Son | — | Illinois |
| 75 | Thomas Walker | 12 | Son | — | Illinois |
| 76 | Richard Walker | 8 | Son | — | Illinois |
| 77 | Le Roy Liffman | 28 | Head | Excavator Tractor | Illinois |
| 78 | Lauretta Liffman | 25 | Wife | — | Illinois |
| 79 | William Liffman | 4 | Son | — | — |
| 80 | Dorothy Liffman | 1 | Daughter | — | — |
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)