JH
John Harding — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this John Harding across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a son (b.~1918), then head of a 7-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Harding |
| Given Name | John AB |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jefferson Township |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Jefferson Township |
| Est. Birth Year | ~1918 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Mary Harding | Daughter | — | 24 | ~1916 |
| Charles Harding | Head | — | 54 | ~1886 |
| John Harding | Son | — | 22 | ~1918 |
| Charles Harding | Son | — | 10 | ~1930 |
| Carrie Harding | Spouse | — | 50 | ~1890 |
| Alma Harding | Other | — | 80 | ~1860 |
| Betty Harding | Daughter | — | 12 | ~1928 |
Census Appearances
1920
Polk, Iowa
Son, age 2
Polk, Iowa · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harding |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 12
Polk, Iowa · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harding |
| Given Name | John H |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| 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
Son, age 22
Polk-County, Iowa · implied b. ~1918 — 7 household members
| Surname | Harding |
| Given Name | John AB |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jefferson Township |
| 1935 Residence (County) | Polk |
| Highest Grade | H-1 |
| 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 John Harding across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Harding (~0.92 confidence) and father Charles Harding (~0.92 confidence) and mother Carrie Harding (~0.92 confidence) and mother Carrie Harding (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Harding
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Charles Harding
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Carrie Harding
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Carrie Harding
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Harding
Son · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Sibling
Betty Harding
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Harding
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Harding
Sibling · 1940 · age 10
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 | 24 | Daughter | — | Iowa |
| 4 | John Ab Harding THIS PERSON | 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
Pedigree Summary
John + 3 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)