DC
Donald Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this Donald Clark across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed), with identified parents Walter & Gertrude — first a son (b.~1920), then head of a 6-person household.
Age 20
b. ~1920
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Clark |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Ball twp. |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farmer |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 100 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Ball Twp |
| Est. Birth Year | ~1920 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Donald | Age | Birth yr |
|---|---|---|---|---|
| Janice Clark | Daughter | — | 15 | ~1925 |
| Margaret Clark | Daughter | — | 13 | ~1927 |
| Donald Clark | Son | — | 20 | ~1920 |
| Walter Clark | Head | — | 53 | ~1887 |
| Gertrude Clark | Spouse | — | 48 | ~1892 |
| Ellen Clark | Daughter | — | 22 | ~1918 |
Census Appearances
1920
Sangamon, Illinois
Son, age
Sangamon, Illinois · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Son, age 10
Sangamon, Illinois · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Donald N. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 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
Son, age 20
Sangamon-County, Illinois · implied b. ~1920 — 6 household members
| Surname | Clark |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Ball twp. |
| 1935 Residence (County) | Sangamon |
| Occupation | Laborer |
| Industry | Farmer |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 100 |
| Highest Grade | Hs 4 |
| 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 Donald Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Walter Clark (~0.92 confidence) and mother Gertrude Clark (~0.92 confidence) and mother Gertrude Clark (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Walter Clark
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Gertrude Clark
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Gertrude Clark
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Donald Clark
Son · 1940 · age 20 · b. ~1920 · Illinois
★ You are viewing this record
Sibling
Ellen Clark
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Clark
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Janice Clark
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 — 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-t0627-00884-00119)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charlene | 34 | Wife | — | Kentucky |
| 2 | Kenneth | 10 | Son | — | Kentucky |
| 3 | Joyce | 8 | Daughter | — | Kentucky |
| 4 | Walter | 5 | Son | — | Kentucky |
| 5 | Wallace | 1 | Son | — | Kentucky |
| 6 | Herman Reliford | 28 | Head | Laborer | Kentucky |
| 7 | Frankie D. Reliford | 22 | Wife | — | Kentucky |
| 8 | Shirley Reliford | 2 | Daughter | — | Illinois |
| 9 | Robert W. D. Girling | 56 | Head | — | Virginia |
| 10 | Josephine Girling | 52 | Wife | — | Illinois |
| 11 | Ed. D. Murphy | 60 | Head | — | Kentucky |
| 12 | Hattie Murphy | 56 | Wife | — | Kentucky |
| 13 | Jesse Murphy | 23 | Son | Laborer | Illinois |
| 14 | Joseph D. Patton | 69 | Head | Farmer | Illinois |
| 15 | Johanna D. Patton | 63 | Wife | — | Illinois |
| 16 | Fred Mans | 42 | Head | Farmer | Illinois |
| 17 | Ella Mans | 40 | Wife | — | Illinois |
| 18 | Doris Mans | 15 | Daughter | — | Illinois |
| 19 | Robert Mans | 14 | Son | — | Illinois |
| 20 | Millie D. Clark | 24 | Head | Farmer | Illinois |
| 21 | Mary Clark | 23 | Wife | — | Illinois |
| 22 | Walter Clark | 53 | Head | Farmer | Illinois |
| 23 | Gertrude Clark | 48 | Wife | — | Illinois |
| 24 | Ellen Clark | 22 | Daughter | Homework | Illinois |
| 25 | Donald Clark THIS PERSON | 20 | Son | Laborer | Illinois |
| 26 | Janice Clark | 15 | Daughter | — | Illinois |
| 27 | Margaret Clark | 13 | Daughter | — | Illinois |
| 28 | John W. Drennan | 60 | Head | Farmer | Illinois |
| 29 | Jesse Drennan | 60 | Wife | — | Illinois |
| 30 | Maurice Frantz | 27 | Hired Hand | Laborer | Illinois |
| 31 | Ben. Rohrer | 63 | Head | — | Illinois |
| 32 | Carrie Rohrer | 61 | Sister | — | Illinois |
| 33 | Frances Rohrer | 51 | Sister | Clerk | Illinois |
| 34 | Louis Wallner | 38 | Head | Farmer | Illinois |
| 35 | Dortha Wallner | 36 | Wife | — | Illinois |
| 36 | Richard Wallner | 16 | Son | Laborer | Illinois |
| 37 | Herman Wallner | 14 | Son | — | Illinois |
| 38 | Pauline Wallner | 13 | Daughter | — | Illinois |
| 39 | Alberta Wallner | 10 | Daughter | — | Illinois |
| 40 | Lena Wallner | 75 | Mother | — | Illinois |
Related Census Records
Pedigree Summary
Donald + 3 siblings
Gen 1 · 3 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)