DC
Donald Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Santa-Clara-County, California
Our Model Tree links this Donald Clark across the 1930 and 1940 US Censuses in Santa-Clara-County, California (XGBoost, ~Confirmed) — first a head (b.~1887), then head of a 9-person household.
Age 53
b. ~1887
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Santa-Clara-County, California |
| Surname | Clark |
| Given Name | Donald B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | San Jose City |
| 1935 Residence (County) | Santa Clara |
| Additional Details | |
| Occupation | Clerk-Stock |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 60 |
| Income (1939) | 749 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerk-Stock |
| Township / Ward | San Jose City |
| Est. Birth Year | ~1887 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Donald | Age | Birth yr |
|---|---|---|---|---|
| Marguerite Clark | Spouse | — | 37 | ~1903 |
| Kenneth Clark | Son | — | 1 | ~1939 |
| Vivian Clark | Daughter | — | 15 | ~1925 |
| Bertha Clark | Daughter | — | 17 | ~1923 |
| Donald Clark | Head | — | 53 | ~1887 |
| Raymond Clark | Son | — | 5 | ~1935 |
| Chester Clark | Son | — | 14 | ~1926 |
| Robert Clark | Son | — | 11 | ~1929 |
| Alfred Clark | Son | — | 4 | ~1936 |
Census Appearances
1930
Santa Clara, …
Head, age 43
Santa Clara, California · implied b. ~1887 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Donald D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 22 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Ohio |
| Occupation | Cook |
| Industry | Insane Hospital |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Santa-Clara-County, California
Head, age 53
Santa-Clara-County, California · implied b. ~1887 — 9 household members
| Surname | Clark |
| Given Name | Donald B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | San Jose City |
| 1935 Residence (County) | Santa Clara |
| Occupation | Clerk-Stock |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 60 |
| Income (1939) | 749 |
| 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 Donald Clark across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Donald Clark
Head · 1940 · age 53 · b. ~1887 · California
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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 — Santa-Clara-County, California
Open full size
1940 US Federal Census — Santa-Clara-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00338-00407)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William C. Fox | 70 | Head | — | California |
| 42 | Frank Malicia | 60 | Head | — | Portugal |
| 43 | William H. Weldon | 82 | Head | — | Kansas |
| 44 | Peter J. Smith | 43 | Head | Pick & Shovel | California |
| 45 | Mary T. Demicheli | 72 | Head | — | Italy |
| 46 | John T. Demicheli | 45 | Son | Repair Man | California |
| 47 | Arthur C. Demicheli | 43 | Son | — | California |
| 48 | Armond C. Demicheli | 42 | Son | Butcher | California |
| 49 | James A. Tircornia | 51 | Brother | Time Keeper | California |
| 50 | Rose H. Tircornia | 54 | Sister | — | California |
| 51 | Valen Pons | 64 | Head | — | France |
| 52 | Mary Pons | 63 | Wife | — | France |
| 53 | Louise Pons | 28 | Daughter | Saleslady | California |
| 54 | Janet Pons | 25 | Daughter | Sorter | California |
| 55 | Donald B. Clark THIS PERSON | 53 | Head | Clerk-Stock | Illinois |
| 56 | Marguerite Clark | 37 | Wife | — | France |
| 57 | Bertha Clark | 17 | Daughter | Sorter | California |
| 58 | Vivian Clark | 15 | Daughter | — | California |
| 59 | Chester Clark | 14 | Son | — | California |
| 60 | Robert Clark | 11 | Son | — | California |
| 61 | Raymond Clark | 5 | Son | — | California |
| 62 | Alfred Clark | 4 | Son | — | California |
| 63 | Kenneth Clark | 1 | Son | — | California |
| 64 | Margaret B. Knoth | 71 | Head | — | Iowa |
| 65 | Walter J. Knoth | 36 | Son | Bottler | California |
| 66 | Lena Knoth | 27 | Daughter-in-law | Clerk | California |
| 67 | June Knoth | 9 | Grand Daughter | — | California |
| 68 | Otis W. Barnwell | 53 | Head | Pick & Shovel | Missouri |
| 69 | Pearl Barnwell | 43 | Wife | — | Arkansas |
| 70 | Ned W. Barnwell | 21 | Son | Picker | Missouri |
| 71 | Eugene Barnwell | 14 | Son | — | Missouri |
| 72 | Audrey F. Barnwell | 3 | Daughter | — | Missouri |
| 73 | Louis V. Martinez | 32 | Head | Trucking | Mexico |
| 74 | Mary Martinez | 28 | Wife | — | California |
| 75 | Dolores Mendenace | 8 | Step daughter | — | California |
| 76 | Leo Martinez | 1 | Son | — | California |
| 77 | Lena De Soto | 28 | Roomer | — | California |
| 78 | Edward Mccormick | 65 | Head | Millner | California |
| 79 | James P. Mccormick | 43 | Son | Forman | California |
| 80 | Louise Mirandette | 67 | Head | — | France |
Related Census Records
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)