HC
Harold Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Crawford-County, Kansas
Our Model Tree links this Harold Clark across the 1920, 1930 and 1940 US Censuses in Crawford-County, Kansas (XGBoost, ~Confirmed), with identified parents Frank & Joseph — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: Kansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Crawford-County, Kansas |
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Pittsburg |
| 1935 Residence (County) | Crawford |
| Additional Details | |
| Occupation | hostler helper |
| Industry | steam railway |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 496 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Occupation | Hostler Helper |
| Township / Ward | Pittsburg |
| Est. Birth Year | ~1909 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Robert Clark | Son | — | 8 | ~1932 |
| Mary Clark | Spouse | — | 30 | ~1910 |
| Harold Clark | Head | — | 31 | ~1909 |
Census Appearances
1920
Crawford, Kansas
Son, age 11
Crawford, Kansas · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Crawford, Kansas
Son, age 21
Crawford, Kansas · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | Laborer |
| Industry | Rail Road Shops |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Crawford-County, Kansas
Head, age 31
Crawford-County, Kansas · implied b. ~1909 — 3 household members
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Pittsburg |
| 1935 Residence (County) | Crawford |
| Occupation | hostler helper |
| Industry | steam railway |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 496 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Clark (~0.92 confidence) and father Joseph Clark (~0.92 confidence) and mother Lillian Clark (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Clark
b. ~1869
Source father
● Household
· direct · ~0.92
Father
Joseph Clark
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Lillian Clark
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Clark
Head · 1940 · age 31 · b. ~1909 · Kansas
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Crawford-County, Kansas
Open full size
1940 US Federal Census — Crawford-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01227-00457)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert W. Booth | 19 | Grand-son | Salesman | Kansas |
| 2 | Edward Lee Booth | 18 | Grand-son | — | Kansas |
| 3 | Arch Wiley | 60 | Head | Buyer | Kansas |
| 4 | Zula Wiley | 52 | roomer | — | Missouri |
| 5 | W. P. Dennell | 62 | Head | Lease Buyer | New York |
| 6 | Catherine Dennell | 56 | wife | — | New York |
| 7 | Clara Vines | 48 | Head | Nurse | Kansas |
| 8 | Raymond Vines | 28 | son | Truck Driver | Kansas |
| 9 | Charles B. Hunter | 45 | Head | — | Kansas |
| 10 | Emma Hunter | 44 | wife | — | Kansas |
| 11 | Nora Channingmeier | 41 | Head | — | Arkansas |
| 12 | William H. Willett | 66 | Head | Hoisting Engineer | Iowa |
| 13 | Winnie Willett | 61 | wife | — | Idaho |
| 14 | Elmer Wilson | 39 | Head | Stationary Fireman | Kansas |
| 15 | Florence Wilson | 42 | wife | — | Kansas |
| 16 | Eddie Claud Wilson | 6 | son | — | Kansas |
| 17 | Mary Ellen Wilson | 4 | daughter | — | Kansas |
| 18 | Thomas Riley Wilson | 1 | son | — | Kansas |
| 19 | Father John | None | M | Sheriff'S Office | — |
| 20 | Glen Hastings | 31 | Head | Clerk | Colorado |
| 21 | Lois Hastings | 28 | wife | — | Kansas |
| 22 | Glen H. Hastings | 8 | son | — | Kansas |
| 23 | Harold Clark THIS PERSON | 31 | Head | Hostler Helper | Kansas |
| 24 | Mary Clark | 30 | wife | — | Kansas |
| 25 | Robert Clark | 8 | son | — | Kansas |
| 26 | Joseph L. Ford | 33 | Head | Roundhouse Laborer | Kansas |
| 27 | Thelma Ford | 29 | wife | — | Kansas |
| 28 | Fred G. Leitz | 69 | Head | Hoister Man | Nebraska |
| 29 | Margaret Leitz | 60 | wife | — | Kentucky |
| 30 | Roy Butler | 34 | Head | Laborer-Road Construction | Missouri |
| 31 | Emma Butler | 37 | wife | — | Missouri |
| 32 | Betty Jean Butler | 8 | daughter | — | Kansas |
| 33 | Leroy Jerkil | 7 | son | — | Kansas |
| 34 | Daughter Lois Lorene | None | F | — | — |
| 35 | Daughter Laquita Lourene | None | F | — | — |
| 36 | William F. Snyder | 56 | Head | — | Indiana |
| 37 | Elizabeth Snyder | 46 | wife | — | Missouri |
| 38 | Mervin Boswell | 31 | Head | Representative | Arkansas |
| 39 | Helen Boswell | 23 | wife | — | Missouri |
| 40 | Mother Heiter | None | F | — | — |
Pedigree Summary
Harold
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)