MN
Mary Nichols — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this Mary Nichols across the 1920, 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1882), then head of a 3-person household.
Age 58
b. ~1882
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Nichols |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Additional Details | |
| Highest Grade | No H4 |
| 1935 Residence | Iowa |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Ottumwa City |
| Est. Birth Year | ~1882 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Charles Nichols | Head | — | 59 | ~1881 |
| Joseph Nichols | Son | — | 20 | ~1920 |
| Mary Nichols | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Wapello, Iowa
Spouse, age 37
Wapello, Iowa · implied b. ~1883 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Wapello, Iowa
Spouse, age 46
Wapello, Iowa · implied b. ~1884 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 26 |
| Father's Birthplace | N. Carolina |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Wapello-County, Iowa
Spouse, age 58
Wapello-County, Iowa · implied b. ~1882 — 3 household members
| Surname | Nichols |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Highest Grade | No H4 |
| 1935 Residence | Iowa |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Mary Nichols across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Nichols
Spouse · 1940 · age 58 · b. ~1882 · 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 — Wapello-County, Iowa
Open full size
1940 US Federal Census — Wapello-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01209-00290)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy J. Cratty | 7 | Daughter | — | Wisconsin |
| 2 | William P Cratty | 1 | Son | — | Iowa |
| 3 | Frank Murfin | 48 | Head | Carpenter | Iowa |
| 4 | Hazel E Murfin | 46 | Wife | — | Iowa |
| 5 | Donald E. Murfin | 17 | Son | Sales Clerk | Iowa |
| 6 | Max M. Murfin | 11 | Son | — | Iowa |
| 7 | Charles E. Nichols | 59 | Head | Electrician | Iowa |
| 8 | Mary A Nichols THIS PERSON | 58 | Wife | — | Illinois |
| 9 | Joseph F Nichols | 20 | Son | Electrician Helper | Iowa |
| 10 | Elmo L. Appel | 42 | Head | Deputy Treasurer | South Dakota |
| 11 | Mary L Appel | 39 | Wife | — | Iowa |
| 12 | Joan C Appel | 8 | Daughter | — | Iowa |
| 13 | William L Wendell | 49 | Head | Telegraph Operator | New York |
| 14 | Agnes C. Wendell | 45 | Wife | — | Illinois |
| 15 | Constance M. Wendell | 18 | Daughter | — | Iowa |
| 16 | Ruth L Wendell | 16 | Daughter | — | Iowa |
| 17 | Marjorie A Wendell | 14 | Daughter | — | Iowa |
| 18 | Ernest Best | 50 | Head | Office Worker | Iowa |
| 19 | Viola O. Best | 49 | Wife | — | Iowa |
| 20 | Odelia May Best | 23 | Daughter | — | Iowa |
| 21 | Ruth E. Best | 19 | Daughter | — | Iowa |
| 22 | Delton L. R. Winpigler | 31 | Head | Proprietor | Iowa |
| 23 | Olive F Winpigler | 29 | Wife | — | Iowa |
| 24 | Delton E Winpigler | 6 | Son | — | Iowa |
| 25 | Shirley A Winpigler | 3 | daughter | — | Iowa |
| 26 | Grace Winpigler | 69 | Mother | — | Iowa |
| 27 | Arthur E. Wymore | 43 | Head | Brakeman | Iowa |
| 28 | Inez M Wymore | 37 | Wife | — | Iowa |
| 29 | Marcella D Wymore | 17 | daughter | — | Iowa |
| 30 | Madelyne R Wymore | 16 | daughter | — | Iowa |
| 31 | Clark B. Wymore | 15 | son | — | Iowa |
| 32 | Robert F. Scott | 74 | Head | — | Missouri |
| 33 | Sarah I Scott | 65 | Wife | — | Missouri |
| 34 | Sadie Blake | 68 | Head | — | Iowa |
| 35 | Mary E. Blake | 64 | Wife | — | Iowa |
| 36 | Effie M. Peppers | 50 | Head | Bookkeeper | Iowa |
| 37 | Richard B Peppers | 19 | Son | Office Worker | Iowa |
| 38 | Doris M Peppers | 17 | daughter | — | Iowa |
| 39 | Myra G. Rolison | 77 | Head | — | Iowa |
| 40 | Wilbur R Rolison | 48 | Son | Fireman | Iowa |
Related Census Records
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)