MH
Mary Harding — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Mary Harding across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1916), then head of a 7-person household.
Age 24
b. ~1916
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Harding |
| Given Name | Mary AB |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jefferson Township |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | S-3 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Jefferson Township |
| Est. Birth Year | ~1916 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Charles Harding | Son | — | 10 | ~1930 |
| Betty Harding | Daughter | — | 12 | ~1928 |
| Carrie Harding | Spouse | — | 50 | ~1890 |
| Charles Harding | Head | — | 54 | ~1886 |
| Mary Harding | Daughter | — | 24 | ~1916 |
| John Harding | Son | — | 22 | ~1918 |
| Alma Harding | Other | — | 80 | ~1860 |
Census Appearances
1930
Polk, Iowa
Daughter, age 14
Polk, Iowa · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harding |
| Given Name | Mary A |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 24
Polk-County, Iowa · implied b. ~1916 — 7 household members
| Surname | Harding |
| Given Name | Mary AB |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jefferson Township |
| 1935 Residence (County) | Polk |
| Highest Grade | S-3 |
| 1935 Residence | Same House |
| 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 Harding across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Harding
Daughter · 1940 · age 24 · b. ~1916 · Iowa
★ You are viewing this record
Sibling
Charles Harding
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Harding
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Harding
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
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
40 people indexed on this census page (nara:1940:m-t0627-01192-00594)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Harding | 54 | Head | Farmer | Iowa |
| 2 | Carrie Harding | 50 | Wife | — | Iowa |
| 3 | Mary Ab Harding THIS PERSON | 24 | Daughter | — | Iowa |
| 4 | John Ab Harding | 22 | Son | — | Iowa |
| 5 | Betty Harding | 12 | Daughter | — | Iowa |
| 6 | Charles Jr Harding | 10 | Son | — | Iowa |
| 7 | Alma Harding | 80 | Mother-in-law | — | New York |
| 8 | Kathryn Herrold | 57 | Head | — | Iowa |
| 9 | William E. Tanner | 73 | Head | Farmer | Illinois |
| 10 | Mary L. Tanner | 64 | Wife | — | Iowa |
| 11 | Oliver P. Herrold | 63 | Lodger | Farmer | Iowa |
| 12 | Jess Baker | 47 | Head | Engineer | Tennessee |
| 13 | Eunice Baker | 44 | Wife | — | Iowa |
| 14 | Samuel Baker | 25 | Son | — | Egypt |
| 15 | Irene Baker | 23 | Daughter | Attendant | Iowa |
| 16 | Beulah Baker | 17 | Daughter | — | Iowa |
| 17 | Jesse Naylor | 45 | Head | Laborer | Iowa |
| 18 | Nellie Naylor | 50 | Wife | — | Iowa |
| 19 | John Falece | 66 | Head | Laborer | Italy |
| 20 | William Findley | 41 | Head | Farmer | Kansas |
| 21 | Mabel Findley | 41 | Wife | — | Kansas |
| 22 | Warren Findley | 19 | Son | Laborer | Kansas |
| 23 | Zola Mae Findley | 15 | Daughter | — | Kansas |
| 24 | Aluane Findley | 13 | Son | — | Kansas |
| 25 | Thomas Smith | 52 | Head | Farmer | Iowa |
| 26 | Luella Smith | 25 | Daughter | — | Iowa |
| 27 | Joseph Smith | 23 | Son | Laborer | Iowa |
| 28 | Catherine Smith | 22 | Daughter | Operator | Iowa |
| 29 | Rosaleta Smith | 19 | Daughter | Press Operator | Iowa |
| 30 | Loretta Smith | 17 | Daughter | — | Iowa |
| 31 | Patricia Smith | 15 | Daughter | — | Iowa |
| 32 | Francis Smith | 13 | Son | — | Iowa |
| 33 | Agneta Smith | 10 | Daughter | — | Iowa |
| 34 | Edward Martin | 35 | Head | Tractor Operator | Nebraska |
| 35 | Thelma Martin | 26 | Daughter | — | Iowa |
| 36 | Phyllis Martin | 5 | Daughter | — | Iowa |
| 37 | Jolene Martin | 1 | Daughter | — | Iowa |
| 38 | Bertha Morehouse | 58 | Mother | House Work | Iowa |
| 39 | George Martin | 56 | Head | Operator | Iowa |
| 40 | Mollie Martin | 55 | Wife | — | Sweden |
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)