JG
John Griffith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Washington-County, Iowa
Our Model Tree links this John Griffith across the 1920, 1930 and 1940 US Censuses in Washington-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1869), then head of a 8-person household.
Age 71
b. ~1869
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Iowa |
| Surname | Griffith |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Franklin Twp |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Franklin Twp |
| Est. Birth Year | ~1869 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| S Griffith | Daughter | — | 36 | ~1904 |
| Henrietta Griffith | Daughter | — | 39 | ~1901 |
| John Griffith | Head | — | 71 | ~1869 |
| J Griffith | Son | — | 33 | ~1907 |
| Warren Griffith | Son | — | 41 | ~1899 |
| Chas Griffith | Son | — | 46 | ~1894 |
| Robert Griffith | Son | — | 30 | ~1910 |
| Barbra Griffith | Spouse | — | 72 | ~1868 |
Census Appearances
1920
Washington, Iowa
Head, age 51
Washington, Iowa · implied b. ~1869 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffith |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Washington, Iowa
Head, age 61
Washington, Iowa · implied b. ~1869 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffith |
| Given Name | John E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 22 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Farmer |
| Industry | Gen Farming |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Washington-County, Iowa
Head, age 71
Washington-County, Iowa · implied b. ~1869 — 8 household members
| Surname | Griffith |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Franklin Twp |
| 1935 Residence (County) | Washington |
| Class of Worker | 0 |
| Highest Grade | H-4 |
| 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 Griffith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Griffith
Head · 1940 · age 71 · b. ~1869 · 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 — Washington-County, Iowa
Open full size
1940 US Federal Census — Washington-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01211-00198)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna F. Kleese | 42 | Wife | — | Iowa |
| 2 | Wilma R. Kleese | 13 | Daughter | — | Iowa |
| 3 | Chas A. Schiebel | 47 | Head | Farmer | Illinois |
| 4 | Winifred E. Schiebel | 42 | Wife | — | Iowa |
| 5 | Rirchard M. Schiebel | 22 | Son | Farmer | Iowa |
| 6 | Elsie Stalder | 20 | Roomer | School Teacher | Iowa |
| 7 | Chas. R. Longer | 42 | Head | Farmer | Iowa |
| 8 | Geneva L. Longer | 38 | Wife | — | Iowa |
| 9 | Charlotte L. Longer | 17 | Daughter | — | Iowa |
| 10 | Deborah J. Longer | 16 | Daughter | — | Iowa |
| 11 | Daryl E. Longer | 15 | Son | — | Iowa |
| 12 | Gerald J. Longer | 10 | Son | — | Iowa |
| 13 | Ralph G. Kelsey | 58 | Head | Manager | Iowa |
| 14 | A. Valma Kelsey | 56 | Wife | — | Iowa |
| 15 | Lyle P. Kelsey | 24 | Son | Hired Hand | Iowa |
| 16 | Walter R. Longer | 34 | Head | Farmer | Iowa |
| 17 | Roxy P. Longer | 32 | Wife | — | Iowa |
| 18 | Elizabeth C. Longer | 12 | Daughter | — | Iowa |
| 19 | Willis W. Longer | 6 | Son | — | Iowa |
| 20 | John E. Griffith THIS PERSON | 71 | Head | — | Iowa |
| 21 | Barbra A. Griffith | 72 | Wife | — | Iowa |
| 22 | Chas. S. Griffith | 46 | Son | Farmer | Iowa |
| 23 | Warren E. Griffith | 41 | Son | Farmer | Iowa |
| 24 | Henrietta M. Griffith | 39 | Daughter | Doctor | Iowa |
| 25 | S. Pauline Griffith | 36 | Daughter | — | Iowa |
| 26 | J. Edwin Griffith | 33 | Son | Farmer | Iowa |
| 27 | Robert H. Griffith | 30 | Son | Farmer | Iowa |
| 28 | Edward F. Heck | 39 | Head | Farmer | Iowa |
| 29 | Irene A. Heck | 29 | Wife | — | Iowa |
| 30 | Jo-Ann D. Heck | 5 | Daughter | — | Iowa |
| 31 | Gerald E. Heck | 3 | Son | — | Iowa |
| 32 | Joyce Y. Heck | 2 | Daughter | — | Iowa |
| 33 | James E. Heck | 0 | Son | — | Iowa |
| 34 | Milada A. Hora | 50 | Mother-in-law | — | Iowa |
| 35 | Glen E. Miller | 35 | Head | Farmer | Iowa |
| 36 | Christie V. Miller | 35 | Wife | — | Iowa |
| 37 | Mildred M. Miller | 16 | Daughter | — | Iowa |
| 38 | Jean I. Miller | 13 | Daughter | — | Iowa |
| 39 | Glen B. Miller | 11 | Son | — | Iowa |
| 40 | Claire D. Neff | 26 | Head | Farmer | 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)