MS
Mary Sloan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Mary Sloan across the 1910, 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1866), then head of a 5-person household.
Age 74
b. ~1866
Female
Head
Born: Ireland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Sloan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (County) | Polk |
| Naturalization Status | Am Cit |
| Additional Details | |
| Highest Grade | Hs 5 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Fourmile Twp |
| Est. Birth Year | ~1866 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margery Cook | Daughter | — | 34 | ~1906 |
| Frank Cook | Other | — | 44 | ~1896 |
| Betty Cook | Other | — | 10 | ~1930 |
| Mary Sloan | Head | — | 74 | ~1866 |
| Ellen Cook | Other | — | 5 | ~1935 |
Census Appearances
1910
Polk, Iowa
Spouse, age 44
Polk, Iowa · implied b. ~1866 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sloan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 26 |
| Children Born | 11 |
| Children Living | 11 |
| Year of Immigration | 1887 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Polk, Iowa
Spouse, age 54
Polk, Iowa · implied b. ~1866 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sloan |
| Given Name | Mary B. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1887 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1892 |
| Birthplace (normalized) | ireland |
1930
Polk, Iowa
Other, age 64
Polk, Iowa · implied b. ~1866 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sloan |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1888 |
| Age at First Marriage | 19 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Polk-County, Iowa
Head, age 74
Polk-County, Iowa · implied b. ~1866 — 5 household members
| Surname | Sloan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (County) | Polk |
| Naturalization Status | Am Cit |
| Highest Grade | Hs 5 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Sloan across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Sloan
Head · 1940 · age 74 · b. ~1866 · 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
39 people indexed on this census page (nara:1940:m-t0627-01192-00535)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Burt Strange | 27 | Head | Tree Surgery | Missouri |
| 2 | Leota Strange | 26 | Wife | — | Iowa |
| 3 | Albert Shipley | 32 | Head | — | Iowa |
| 4 | Gertrude Shipley | 29 | Wife | — | Iowa |
| 5 | Joanna M. Shipley | 5 | Daughter | — | Iowa |
| 6 | Anna Jackson | 65 | House Keeper | Private Home | Ill. |
| 7 | J. S. Mccarty | 72 | Head | — | Iowa |
| 8 | Ora Brody | 31 | Head | — | Iowa |
| 9 | Gladys M. Brody | 28 | Wife | — | Iowa |
| 10 | Melba J. Brody | 4 | Daughter | — | Iowa |
| 11 | Gerald M. Brody | 6 | Daughter | — | Iowa |
| 12 | Larry Brody | 2 | Son | — | Iowa |
| 13 | Heman Brody | 29 | Head | — | Iowa |
| 14 | Mary Brody | 29 | Wife | — | Iowa |
| 15 | Mary K. Brody | 1 | Daughter | — | Iowa |
| 16 | J. B. Cunningham | 46 | Head | — | Iowa |
| 17 | Helena Cunningham | 47 | Wife | — | Ill. |
| 18 | Cecil Cunningham | 15 | Son | — | Iowa |
| 19 | Carl M. Brackett | 30 | Head | — | Iowa |
| 20 | Lelia Brackett | 27 | Wife | — | Iowa |
| 21 | John T. Fulmer | 55 | Head | — | Iowa |
| 22 | Sarah Fulmer | 55 | Wife | — | Iowa |
| 23 | W. E. Hirshman | 40 | Head | — | Ill. |
| 24 | Ruth Hirshman | 39 | Wife | — | Arkansas |
| 25 | Carl Hirshman | 7 | Son | — | Iowa |
| 26 | John Hendrix | 12 | Son | — | Iowa |
| 27 | James John Hendrix | 10 | Son | — | Iowa |
| 28 | Charles Jackson | 58 | Head | — | Tennessee |
| 29 | Mabel Jackson | 37 | Wife | — | Iowa |
| 30 | Mary Sloan THIS PERSON | 74 | Head | — | Ireland |
| 31 | Frank Cook | 44 | Son in law | — | Iowa |
| 32 | Margery Cook | 34 | Daughter | — | Iowa |
| 33 | Betty Lou Cook | 10 | Grand daughter | — | Iowa |
| 34 | Ellen Cook | 5 | Grand daughter | — | Iowa |
| 35 | Amanda Decker | 64 | Head | — | Iowa |
| 36 | Jane Warnock | 73 | Head | — | Iowa |
| 37 | Florence Warnock | 30 | Daughter | — | Iowa |
| 38 | Alvin Swanson | 40 | Head | — | Texas |
| 39 | Lillie Swanson | 35 | Wife | — | 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)