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Gertrude Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this Gertrude Clark across the 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1906), then head of a 7-person household.
Age 34
b. ~1906
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Clark |
| Given Name | Gertrude |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Springfield City |
| Est. Birth Year | ~1906 |
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 Gertrude | Age | Birth yr |
|---|---|---|---|---|
| Wm Clark | Son | — | 14 | ~1926 |
| John Clark | Head | — | 36 | ~1904 |
| Paul Clark | Son | — | 12 | ~1928 |
| Carl Clark | Son | — | 9 | ~1931 |
| Elmer Clark | Son | — | 10 | ~1930 |
| Ruth Clark | Daughter | — | 3 | ~1937 |
| Gertrude Clark | Spouse | — | 34 | ~1906 |
Census Appearances
1930
Sangamon, Illinois
Spouse, age 24
Sangamon, Illinois · implied b. ~1906 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Gertrude L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 12 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Spouse, age 34
Sangamon-County, Illinois · implied b. ~1906 — 7 household members
| Surname | Clark |
| Given Name | Gertrude |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Class of Worker | 0 |
| Highest Grade | No 5 |
| 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 Gertrude Clark across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Gertrude Clark
Spouse · 1940 · age 34 · b. ~1906 · 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 — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00886-00382)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Henry Leeder | 33 | Son | Florist | Illinois |
| 2 | Eva Ryan | 25 | Daughter | — | Illinois |
| 3 | Norman T. Ryan | 35 | Son-in-law | Piece Worker | Illinois |
| 4 | Norman L. Ryan | 5 | Grandson | — | — |
| 5 | Edith Leeder | 30 | Daughter-in-law | — | Illinois |
| 6 | Robert E. Leeder | 37 | Son | — | Illinois |
| 7 | Geo B. Bates | 77 | Head | — | Illinois |
| 8 | C. E. Schlemm | 66 | Head | — | New Jersey |
| 9 | Emma Schlemm | 60 | Wife | — | Germany |
| 10 | R. C. Mcclain | 55 | Head | Watchman | Indiana |
| 11 | Mabel Mcclain | 55 | Wife | — | Illinois |
| 12 | John J. Devlin | 58 | Head | Superintendent | Illinois |
| 13 | Ruby Devlin | 49 | Wife | — | Missouri |
| 14 | John J. Jr. Devlin | 13 | Son | — | Illinois |
| 15 | Laura Devlin | 65 | Wife | — | Illinois |
| 16 | James Turner | 70 | Brother-in-law | — | Illinois |
| 17 | Oscar S. Ansell | 77 | Head | Owner | New York |
| 18 | Edna Johnson | 51 | Daughter | — | Illinois |
| 19 | Ruth Hoffman | 27 | Servant | Servant | Illinois |
| 20 | John Clark | 36 | Head | Laborer | Illinois |
| 21 | Gertrude Clark THIS PERSON | 34 | Wife | — | Illinois |
| 22 | Wm J. Clark | 14 | Son | — | Michigan |
| 23 | Paul Clark | 12 | Son | — | Illinois |
| 24 | Elmer Clark | 10 | Son | — | Michigan |
| 25 | Carl Clark | 9 | Son | — | Illinois |
| 26 | Ruth Clark | 3 | Daughter | — | — |
| 27 | Alvin D. Singleton | 78 | Head | Gardener | Illinois |
| 28 | Mary A. Singleton | 53 | Wife | — | Missouri |
| 29 | John D. Singleton | 65 | Head | Laborer | Illinois |
| 30 | Nelly Ragland | 78 | Sister | Janitor | Illinois |
| 31 | Elizabeth Singleton | 72 | Sister | Laborer | Illinois |
| 32 | Frank Drury | 65 | Head | Trucker | Illinois |
| 33 | Gertrude Drury | 59 | Wife | — | Illinois |
| 34 | Elizabeth Drury | 23 | Daughter | Cashier | Illinois |
| 35 | Lewis Barnes | 31 | Head | Carpenter | Illinois |
| 36 | Hazel Barnes | 25 | Wife | — | Illinois |
| 37 | Kenneth Barnes | 7 | Son | — | — |
| 38 | Joseph Keeley | 29 | Head | Coal Mine | Illinois |
| 39 | Margaret Keeley | 30 | Wife | — | Illinois |
| 40 | John Jos. Keeley | 3 | Son | — | — |
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)