GT
Grace Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Guthrie-County, Iowa
Our Model Tree links this Grace Thomas across the 1910, 1920, 1930 and 1940 US Censuses in Guthrie-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1887), then head of a 3-person household.
Age 53
b. ~1887
Female
Spouse
Born: Colorado
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Guthrie-County, Iowa |
| Surname | Thomas |
| Given Name | Grace |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Guthrie |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Seeley Twp |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Grace | Age | Birth yr |
|---|---|---|---|---|
| Mary Thomas | Daughter | — | 27 | ~1913 |
| Grace Thomas | Spouse | — | 53 | ~1887 |
| Baird Masson | Other | — | 24 | ~1916 |
Census Appearances
1910
Guthrie, Iowa
Other, age 23
Guthrie, Iowa · implied b. ~1887 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Grace |
| Relationship to Head | Daughter in law |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Colorado |
| Years Married | 1 |
| Children Born | 1 |
| Children Living | 1 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Michigan |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1920
Guthrie, Iowa
Spouse, age 33
Guthrie, Iowa · implied b. ~1887 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Grace H. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Colorado |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Guthrie, Iowa
Spouse, age 44
Guthrie, Iowa · implied b. ~1886 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Gertie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Colorado |
| Age at First Marriage | 22 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Guthrie-County, Iowa
Spouse, age 53
Guthrie-County, Iowa · implied b. ~1887 — 3 household members
| Surname | Thomas |
| Given Name | Grace |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Guthrie |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| 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 Grace Thomas across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Grace Thomas
Spouse · 1940 · age 53 · b. ~1887 · 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 — Guthrie-County, Iowa
Open full size
1940 US Federal Census — Guthrie-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01163-00719)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Grace Thomas THIS PERSON | 53 | Wife | — | Colorado |
| 42 | Mary Thomas | 27 | Daughter | — | Iowa |
| 43 | Baird Masson | 24 | Hired Hand | Farm Laborer | Iowa |
| 44 | Roy Ely | 51 | Head | Farmer | Iowa |
| 45 | Bessie Ely | 51 | Wife | — | Iowa |
| 46 | Mildred Ely | 19 | Daughter | — | Iowa |
| 47 | Ruby Ely | 17 | Daughter | — | Iowa |
| 48 | Robert Ely | 13 | Son | — | Iowa |
| 49 | Everett Ely | 23 | Head | Farmer Laborer | Iowa |
| 50 | Henrietta Ely | 23 | Wife | — | Iowa |
| 51 | Theodore Ely | 3 | Son | — | Iowa |
| 52 | Thomas Ely | 1 | Son | — | Iowa |
| 53 | George Ely | 55 | Uncle | Farmer | Iowa |
| 54 | Edward Ely | 60 | Uncle | Farmer | Iowa |
| 55 | Winfield F. Ameberry | 46 | Head | Farmer | Iowa |
| 56 | Lena Mae Ameberry | 42 | Wife | — | Iowa |
| 57 | Ellis Shipley | 47 | Hired Hand | Farm Laborer | Iowa |
| 58 | Frank L. Curley | 50 | Head | Farmer | Nebraska |
| 59 | Opal Curley | 51 | Wife | — | Iowa |
| 60 | Frances A. Curley | 19 | Daughter | — | Nebraska |
| 61 | Laura Coryell | 78 | Mother-in-law | — | Illinois |
| 62 | Ernest Sellman | 46 | Head | Farmer | Nebraska |
| 63 | Lake Sellman | 47 | Wife | — | Iowa |
| 64 | Ronald Sellman | 17 | Son | — | Iowa |
| 65 | Nick Knight | 52 | Head | Farm Laborer | Iowa |
| 66 | Anna Knight | 38 | Wife | — | Iowa |
| 67 | George Knight | 16 | Son | Farm Laborer | Iowa |
| 68 | Evelyn Knight | 13 | Daughter | — | Iowa |
| 69 | Margaret Knight | 12 | Daughter | — | Iowa |
| 70 | Grace Knight | 11 | Daughter | — | Iowa |
| 71 | Hazel Knight | 6 | Daughter | — | Iowa |
| 72 | Harold Knight | 4 | Son | — | Iowa |
| 73 | Halbert France | 39 | Head | Farmer | Iowa |
| 74 | Marguerite France | 39 | Wife | — | Iowa |
| 75 | Nolan Elwin France | 1 | Son | — | Iowa |
| 76 | Earl Moreland | 23 | Head | Farm Laborer | Iowa |
| 77 | Wanda Moreland | 19 | Wife | — | Iowa |
| 78 | James A. Moreland | 65 | Head | Farmer | Iowa |
| 79 | Nellie Moreland | 59 | Wife | — | Iowa |
| 80 | Mae Helen Moreland | 20 | Daughter | — | 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)