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Mary Underwood — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Webster-County, Iowa
Our Model Tree links this Mary Underwood across the 1920, 1930 and 1940 US Censuses in Webster-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1873), then head of a 3-person household.
Age 67
b. ~1873
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Webster-County, Iowa |
| Surname | Underwood |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Ft Dodge |
| 1935 Residence (County) | Webster |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Ft Dodge |
| Est. Birth Year | ~1873 |
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 |
|---|---|---|---|---|
| Florence Underwood | Daughter | — | 44 | ~1896 |
| Sherwood Underwood | Head | — | 73 | ~1867 |
| Mary Underwood | Spouse | — | 67 | ~1873 |
Census Appearances
1920
Webster, Iowa
Spouse, age 46
Webster, Iowa · implied b. ~1874 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Underwood |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Webster, Iowa
Spouse, age 56
Webster, Iowa · implied b. ~1874 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Underwood |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 18 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Webster-County, Iowa
Spouse, age 67
Webster-County, Iowa · implied b. ~1873 — 3 household members
| Surname | Underwood |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Ft Dodge |
| 1935 Residence (County) | Webster |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| 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 Mary Underwood 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 Underwood
Spouse · 1940 · age 67 · b. ~1873 · 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 — Webster-County, Iowa
Open full size
1940 US Federal Census — Webster-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01212-00699)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Andrew Pate | 35 | Head | — | Nebraska |
| 42 | Arthur Pate | 19 | Son | — | Iowa |
| 43 | Lewis Pate | 16 | Son | — | Iowa |
| 44 | Edward Pate | 10 | Son | — | Iowa |
| 45 | Jennie Knutson | 30 | Head | Housework By Day | So Dakota |
| 46 | Marlene Knutson | 12 | Daughter | — | Iowa |
| 47 | Shirley Knutson | 11 | Daughter | — | Iowa |
| 48 | Betty Knutson | 9 | Daughter | — | Iowa |
| 49 | Evelyn Knutson | 7 | Daughter | — | Iowa |
| 50 | Lavaughan Knutson | 4 | Daughter | — | Iowa |
| 51 | Jenora Knutson | 1 | Daughter | — | Iowa |
| 52 | Hannie Mccloud | 63 | Mother | — | Iowa |
| 53 | Karl Hold | 81 | Head | — | Iowa |
| 54 | Edwin Samuelson | 50 | Head | Brick Mason | Iowa |
| 55 | Anna Samuelson | 42 | Wife | — | Iowa |
| 56 | Robert Samuelson | 18 | Son | — | Iowa |
| 57 | Beverly Samuelson | 12 | Daughter | — | Iowa |
| 58 | Laurence Clements | 54 | Head | Steamfitter | Ireland |
| 59 | Sarah Clements | 49 | Wife | — | Ireland |
| 60 | Daniel T. Groat | 48 | Head | Machinist | Iowa |
| 61 | Mabel Groat | 37 | Wife | — | Iowa |
| 62 | Doris Groat | 15 | Daughter | — | Iowa |
| 63 | Freeman Groat | 10 | Son | — | Iowa |
| 64 | Myron Groat | 9 | Son | — | Iowa |
| 65 | Sherwood Underwood | 73 | Head | — | Iowa |
| 66 | Mary Underwood THIS PERSON | 67 | Wife | — | Iowa |
| 67 | Florence Underwood | 44 | Daughter | Floorlady | Iowa |
| 68 | Englebert Tricker | 69 | Head | Oil Tank Salesman | Nebraska |
| 69 | Katherine Tricker | 68 | Wife | — | Iowa |
| 70 | Jay Mitchell | 42 | Head | Water Dept | Iowa |
| 71 | Hattie Mitchell | 39 | Wife | — | Iowa |
| 72 | Geraldine Mitchell | 17 | Daughter | — | Iowa |
| 73 | Albert Ellinger | 52 | Head | Salesman | Iowa |
| 74 | Anna Ellinger | 49 | Wife | — | Iowa |
| 75 | Lester Ellinger | 21 | Son | — | Iowa |
| 76 | Elmer Barber | 42 | Head | Salesman | Iowa |
| 77 | Mary Barber | 33 | Wife | Saleslady | Iowa |
| 78 | Barbara Barber | 13 | Daughter | — | Iowa |
| 79 | Daryl Barber | 11 | Son | — | Iowa |
| 80 | Alfred Nelson | 55 | Head | Real Estate | 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)