RT
Ralph Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Woodbury-County, Iowa
Our Model Tree links this Ralph Thomas across the 1920, 1930 and 1940 US Censuses in Woodbury-County, Iowa (XGBoost, ~Confirmed), with identified parents C & Clarence — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: Colorado
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Woodbury-County, Iowa |
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Moville town |
| 1935 Residence (County) | Woodbury |
| Additional Details | |
| Occupation | Farm Laborer |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 866 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Farm Laborer |
| Township / Ward | Moville Town |
| 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 Ralph | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Thomas | Spouse | — | 23 | ~1917 |
| Gerald Thomas | Son | — | 5 | ~1935 |
| Ralph Thomas | Head | — | 31 | ~1909 |
Census Appearances
1920
Woodbury, Iowa
Son, age 11
Woodbury, Iowa · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Woodbury, Iowa
Son, age 21
Woodbury, Iowa · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farm Laborer |
| Industry | General Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Woodbury-County, Iowa
Head, age 31
Woodbury-County, Iowa · implied b. ~1909 — 3 household members
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Moville town |
| 1935 Residence (County) | Woodbury |
| Occupation | Farm Laborer |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 866 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father C Thomas (~0.92 confidence) and father Clarence Thomas (~0.92 confidence) and mother Ida Thomas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
C Thomas
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Clarence Thomas
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Ida Thomas
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Thomas
Head · 1940 · age 31 · b. ~1909 · Iowa
★ 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 — Woodbury-County, Iowa
Open full size
1940 US Federal Census — Woodbury-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01214-00008)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Einar W. Widmark | 49 | Head | Barber | Sweden |
| 2 | Ruth M. Widmark | 44 | Wife | Housewife | Wisconsin |
| 3 | Charles R. Widmark | 18 | Son | Clerk | Minnesota |
| 4 | Lenore D. Uraig|Craig | 52 | Head | Clerk & Book-Keeper | Iowa |
| 5 | Ruth S. Leaptrot | 23 | Roomer | Teacher | Iowa |
| 6 | Helen Wellenstein | 26 | Roomer | Teacher | Nebraska |
| 7 | Jessie Campbell | 24 | Roomer | Teacher | Iowa |
| 8 | Vera Reisert | 19 | Roomer | Stenographer | Nebraska |
| 9 | Clara R. Livermore | 77 | Head | Housewife | Iowa |
| 10 | Cleone Wright | 25 | Grand-daughter | Housewife | Iowa |
| 11 | Vesta Wright | 25 | Grand-daughter | Housewife | Iowa |
| 12 | Amy B. John | 46 | Head | Housewife | Iowa |
| 13 | Wilbur John | 21 | Son | — | North Dakota |
| 14 | Julius Stolley | 60 | Head | Manager | Germany |
| 15 | Alice D. Stolley | 47 | Wife | Housewife | Illinois |
| 16 | Belle Thornley | 71 | Head | Housewife | Pennsylvania |
| 17 | Glen Tracewell | 45 | Head | Salesman | Nebraska |
| 18 | Mabel Tracewell | 32 | Wife | Housewife | Iowa |
| 19 | Betty Arlene Tracewell | 2 | Daughter | — | Iowa |
| 20 | Ralph Thomas THIS PERSON | 31 | Head | Farm Laborer | Colorado |
| 21 | Dorothy Thomas | 23 | Wife | Housewife | Iowa |
| 22 | Gerald Thomas | 5 | Son | — | Iowa |
| 23 | Cleveland Mullinix | 57 | Head | Mechanic | Iowa |
| 24 | Anna Mullinix | 46 | Wife | Housewife | Iowa |
| 25 | Marion Mullinix | 15 | Son | — | Iowa |
| 26 | Samuel W. Hoult | 85 | Father-in-law | — | West Virginia |
| 27 | Eva D. Albertson | 72 | Head | Housewife | Wisconsin |
| 28 | Marie Bartholomew | 81 | Head | Housewife | Germany |
| 29 | Charles Ford | 66 | Head | Day Laborer | Michigan |
| 30 | Bertha D. Ford | 60 | Wife | Housewife | Iowa |
| 31 | Arthur Ford | 33 | Son | — | Iowa |
| 32 | Harry S. Wahlberg | 41 | Head | Trucker | Iowa |
| 33 | Helen J. Wahlberg | 33 | Wife | Housewife | Minnesota |
| 34 | William Wahlberg | 2 | Son | — | Iowa |
| 35 | Emeline Conaway | 84 | Head | — | Iowa |
| 36 | Bessie Conaway | 50 | Daughter | Switch Board Operator | Iowa |
| 37 | John W. Howe | 68 | Head | Farmer | Germany |
| 38 | Elizabeth Howe | 73 | Wife | Housewife | Germany |
| 39 | John D. Wink | 77 | Head | — | Iowa |
| 40 | Ida Wink | 65 | Wife | — | Ohio |
Pedigree Summary
Ralph
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)