RC
Ralph Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Alfalfa-County, Oklahoma
Our Model Tree links this Ralph Clark across the 1920, 1930 and 1940 US Censuses in Alfalfa-County, Oklahoma (XGBoost, ~Confirmed), with identified parents James & Etta — first a head (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Male
Head
Born: Oklahoma
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Alfalfa-County, Oklahoma |
| Surname | Clark |
| Given Name | Ralph L |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Oklahoma |
| 1935 Residence (City) | Byron township |
| 1935 Residence (County) | Alfalfa |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 452 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
| Occupation | Farmer |
| Township / Ward | Byron Township |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ralph | Age | Birth yr |
|---|---|---|---|---|
| Mary Clark | Daughter | — | 12 | ~1928 |
| Thomas Clark | Son | — | 10 | ~1930 |
| Nina Clark | Spouse | — | 31 | ~1909 |
| Ralph Clark | Head | — | 31 | ~1909 |
| Betty Clark | Daughter | — | 3 | ~1937 |
Census Appearances
1920
Alfalfa, Oklahoma
Son, age 10
Alfalfa, Oklahoma · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Ralph L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Oklahoma |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
1930
Alfalfa, Oklahoma
Head, age 20
Alfalfa, Oklahoma · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Ralph L |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Married |
| Birthplace | Oklahoma |
| Age at First Marriage | 19 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Radio Set | R |
| Veteran | No |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
1940
Alfalfa-County, Oklahoma
Head, age 31
Alfalfa-County, Oklahoma · implied b. ~1909 — 5 household members
| Surname | Clark |
| Given Name | Ralph L |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Oklahoma |
| 1935 Residence (City) | Byron township |
| 1935 Residence (County) | Alfalfa |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 452 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
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 Ralph Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Clark (~0.92 confidence) and mother Etta Clark (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Clark
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Etta Clark
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Clark
Head · 1940 · age 31 · b. ~1909 · Oklahoma
★ 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 — Alfalfa-County, Oklahoma
Open full size
1940 US Federal Census — Alfalfa-County, Oklahoma
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03274-00492)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Roberta A Jack | 18 | Daughter | — | Oklahoma |
| 2 | J. W. Jack | 15 | Son | — | Oklahoma |
| 3 | Wendell W Simeson | 27 | Head | Farmer | Montana |
| 4 | Joy A Simeson | 21 | Wife | — | Oklahoma |
| 5 | Bethany R Simeson | 0 | Daughter | — | Oklahoma |
| 6 | Ralph L Clark THIS PERSON | 31 | Head | Farmer | Oklahoma |
| 7 | Nina E Clark | 31 | Wife | — | Oklahoma |
| 8 | Mary E Clark | 12 | Daughter | — | Oklahoma |
| 9 | Thomas C Clark | 10 | Son | — | Oklahoma |
| 10 | Betty A Clark | 3 | Daughter | — | Oklahoma |
| 11 | John H Hilton | 64 | Head | Farmer | Missouri |
| 12 | Edith G Hilton | 55 | Wife | — | Mississippi |
| 13 | Desta E Hilton | 15 | Daughter | — | Oklahoma |
| 14 | Lowell L Rucker | 43 | Head | Farmer | Iowa |
| 15 | Pearl L Rucker | 41 | Wife | — | Illinois |
| 16 | Maxine J Rucker | 19 | Daughter | — | Oklahoma |
| 17 | Wilma L Rucker | 17 | Daughter | — | Oklahoma |
| 18 | Freda M Rucker | 15 | Daughter | — | Oklahoma |
| 19 | Bobby L Rucker | 10 | Son | — | Oklahoma |
| 20 | Vernia R Rucker | 6 | Daughter | — | Oklahoma |
| 21 | Anita P Rucker | 3 | Daughter | — | Oklahoma |
| 22 | Charles E Cutright | 48 | Head | Farmer | Kansas |
| 23 | Pearl M Cutright | 40 | Wife | — | Oklahoma |
| 24 | Ethel R Cutright | 16 | Daughter | — | Oklahoma |
| 25 | George E Cutright | 13 | Son | — | Oklahoma |
| 26 | Ray C Cutright | 6 | Son | — | Oklahoma |
| 27 | John R Tucker | 68 | Head | Farmer | Virginia |
| 28 | Maud M Tucker | 66 | Wife | — | Iowa |
| 29 | John I Tucker | 20 | Son | — | Oklahoma |
| 30 | Ralph H Collins | 32 | Son-in-law | — | Oklahoma |
| 31 | Mildred C Collins | 25 | Daughter | — | Oklahoma |
| 32 | Marilyn J Collins | 2 | Daughter | — | Oklahoma |
| 33 | Joe M Slipper | 52 | Head | Farmer | Oklahoma |
| 34 | Verda M Slipper | 37 | Wife | — | Oklahoma |
| 35 | Glen J Slipper | 5 | Son | — | Kansas |
| 36 | Laralee G Slipper | 4 | Daughter | — | Oklahoma |
| 37 | Gottfried H Belter | 51 | Head | Farmer | North Dakota |
| 38 | Jessie L Belter | 55 | Wife | — | Missouri |
| 39 | Donald C Belter | 19 | Son | — | Oklahoma |
| 40 | Lester F Belter | 17 | Son | — | Oklahoma |
Pedigree Summary
Ralph
Gen 1 · 2 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)