RC
Ralph Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Ralph Clark across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1908), then head of a 7-person household.
Age 32
b. ~1908
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Clark |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Detroit |
| Additional Details | |
| Occupation | night watchman |
| Industry | Storm sewer |
| Class of Worker | GW |
| Hours Worked | 78 |
| Income (1939) | 400 |
| Highest Grade | G 8 |
| 1935 Residence | Michigan |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Night Watchman |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1908 |
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 Ralph | Age | Birth yr |
|---|---|---|---|---|
| Phyllis Clark | Daughter | — | 1 | ~1939 |
| Anna Clark | Daughter | — | 12 | ~1928 |
| Helen Clark | Daughter | — | 5 | ~1935 |
| Richard Clark | Son | — | 3 | ~1937 |
| Eunice Clark | Spouse | — | 30 | ~1910 |
| Audrey Clark | Daughter | — | 9 | ~1931 |
| Ralph Clark | Head | — | 32 | ~1908 |
Census Appearances
1930
Polk, Iowa
Other, age 22
Polk, Iowa · implied b. ~1908 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Ralph |
| Relationship to Head | Roomer |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Elevator Oper. |
| Industry | Hotel |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Head, age 32
Polk-County, Iowa · implied b. ~1908 — 7 household members
| Surname | Clark |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Detroit |
| Occupation | night watchman |
| Industry | Storm sewer |
| Class of Worker | GW |
| Hours Worked | 78 |
| Income (1939) | 400 |
| Highest Grade | G 8 |
| 1935 Residence | Michigan |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ralph Clark
Head · 1940 · age 32 · b. ~1908 · Iowa
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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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01196-00792)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Saunders | 37 | daughter | Seamstress | Iowa |
| 42 | Edward Saunders | 19 | grandson | Soil Conservation | Iowa |
| 43 | Katie D. Huffman | 71 | Head | Seamstress | Ohio |
| 44 | Harold Dingman | 33 | Head | Clerk | Iowa |
| 45 | Bertha Dingman | 28 | Wife | Waitress | Iowa |
| 46 | Edmund Dingman | 13 | Son | — | Iowa |
| 47 | Charles Dingman | 10 | Son | — | Iowa |
| 48 | Betty Dingman | 9 | daughter | — | Iowa |
| 49 | Mary Dingman | 7 | daughter | — | Iowa |
| 50 | John W. Danbman | 59 | Head | Custodian | Missouri |
| 51 | Lucinda Danbman | 66 | Wife | — | Arkansas |
| 52 | Lawrence Prather | 29 | Head | Clerk | Iowa |
| 53 | Jennie O. Prather | 29 | Wife | — | Iowa |
| 54 | William Prather | 3 | Son | — | Iowa |
| 55 | Betty Robbins | 23 | — | Seamstress | Iowa |
| 56 | Donald Robbins | 4 | — | — | Iowa |
| 57 | Alice E. Waller | 55 | Head | School Teacher | Wisconsin |
| 58 | John Clement | 19 | Head | Truck Driver | Iowa |
| 59 | Lillian Clement | 19 | Wife | — | Missouri |
| 60 | Rosella Clement | 76 | granddaughter | — | Iowa |
| 61 | Harry Mawson | 40 | Head | Laborer | Iowa |
| 62 | Lucila Mawson | 34 | Wife | — | Iowa |
| 63 | Ralph Clark THIS PERSON | 32 | Head | Night Watchman | Iowa |
| 64 | Eunice G. Clark | 30 | Wife | — | Iowa |
| 65 | Anna J. Clark | 12 | daughter | — | Iowa |
| 66 | Audrey Clark | 9 | daughter | — | Iowa |
| 67 | Helen L. Clark | 5 | daughter | — | Michigan |
| 68 | Richard Clark | 3 | Son | — | Iowa |
| 69 | Phyllis Clark | 1 | daughter | — | Iowa |
| 70 | Roy Clements | 45 | Head | Bus Operator | Iowa |
| 71 | Edna Clements | 47 | Wife | Stenographer | Iowa |
| 72 | Howard E. Clements | 17 | Son | — | Iowa |
| 73 | Harold M. Clements | 15 | Son | — | Iowa |
| 74 | Louise A. Clements | 13 | daughter | — | Iowa |
| 75 | Mary J. Lewis | 76 | Head | — | Missouri |
| 76 | Homer Lewis | 46 | Son | Barber | Iowa |
| 77 | Melva Merriam | 71 | Head | — | Iowa |
| 78 | Cora Merriam | 68 | Wife | — | Iowa |
| 79 | Rowena Palmer | 73 | Head | — | Iowa |
| 80 | Bernice Palmer | 36 | daughter | Bookkeeper | Iowa |
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)