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George Griffin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Iowa
Our Model Tree links this George Griffin across the 1930 and 1940 US Censuses in Jefferson-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 10-person household.
Age 18
b. ~1922
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Iowa |
| Surname | Griffin |
| Given Name | George L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Lockridge town |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Laborer |
| Industry | Construction |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 180 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Laborer |
| Township / Ward | Lockridge Town |
| Est. Birth Year | ~1922 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to George | Age | Birth yr |
|---|---|---|---|---|
| Shirley Griffin | Daughter | — | 5 | ~1935 |
| Betty Griffin | Daughter | — | 16 | ~1924 |
| Lilla Griffin | Daughter | — | 10 | ~1930 |
| Mary Griffin | Daughter | — | 12 | ~1928 |
| Archie Griffin | Head | — | 45 | ~1895 |
| Earl Griffin | Son | — | 19 | ~1921 |
| Archie Griffin | Son | — | 14 | ~1926 |
| George Griffin | Son | — | 18 | ~1922 |
| Raymond Griffin | Son | — | 23 | ~1917 |
| Ethel Griffin | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Jefferson, Iowa
Son, age 7
Jefferson, Iowa · implied b. ~1923 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | George |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Jefferson-County, Iowa
Son, age 18
Jefferson-County, Iowa · implied b. ~1922 — 10 household members
| Surname | Griffin |
| Given Name | George L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Lockridge town |
| 1935 Residence (County) | Jefferson |
| Occupation | Laborer |
| Industry | Construction |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 180 |
| Highest Grade | H 2 |
| 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 George Griffin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
George Griffin
Son · 1940 · age 18 · b. ~1922 · Iowa
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Sibling
Lilla Griffin
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Griffin
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Griffin
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Griffin
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Griffin
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Archie Griffin
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Griffin
Sibling · 1940 · age 16
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 — Jefferson-County, Iowa
Open full size
1940 US Federal Census — Jefferson-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01170-00318)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Archie B. Griffin | 45 | Head | Plasterer | Iowa |
| 2 | Ethel M. Griffin | 43 | Wife | House Work | Iowa |
| 3 | Raymond H. Griffin | 23 | Son | Plasterer Helper | Iowa |
| 4 | Earl E. Griffin | 19 | Son | Plasterer Helper | Iowa |
| 5 | George L. Griffin THIS PERSON | 18 | Son | Laborer | Iowa |
| 6 | Betty J. Griffin | 16 | Daughter | — | Iowa |
| 7 | Archie B. Griffin | 14 | Son | — | Iowa |
| 8 | Mary L. Griffin | 12 | Daughter | — | Iowa |
| 9 | Lilla M. Griffin | 10 | Daughter | — | Iowa |
| 10 | Shirley R. Griffin | 5 | Daughter | — | Iowa |
| 11 | Lincoln H. Heater | 71 | Head | Old Age | Iowa |
| 12 | Elsie M. Heater | 63 | Wife | House Work | Iowa |
| 13 | Ernest G. Luce | 61 | Head | Dairyman | Germany |
| 14 | Lena R. Luce | 60 | Wife | House Work | Minnesota |
| 15 | Harry E. Anderson | 43 | Head | Laborer | Iowa |
| 16 | Mary E. Anderson | 28 | Wife | House Work | Iowa |
| 17 | Mattie E. Anderson | 2 | Daughter | — | Iowa |
| 18 | Hugh R. Isaacson | 33 | Head | Road Surveyor | Iowa |
| 19 | Naomi L. Isaacson | 32 | Wife | House Work | Iowa |
| 20 | Robert E. Isaacson | 7 | Son | — | Iowa |
| 21 | Marilyn L. Isaacson | 3 | Daughter | — | Iowa |
| 23 | Louis T. Huff | 57 | Head | Housework | Iowa |
| 24 | Carl H. Huff | 28 | Son | R Road Section | Iowa |
| 25 | Elsie W. Huff | 27 | Wife | Housework | Iowa |
| 26 | Junior L. Huff | 8 | Son | — | Iowa |
| 27 | Mary L. Gohnbach | 72 | Head | Housework Old Age | Iowa |
| 28 | Clara M. Jacobs | 74 | Head | Housework Old Age | Sweden |
| 29 | Lena Berg | 41 | Head | Post Office Asst | Iowa |
| 30 | Paul E. Berg | 14 | Son | — | Iowa |
| 31 | Robert H. Berg | 11 | Son | — | Iowa |
| 32 | Frank O. Dingwall | 68 | Head | Cement Finisher | Sweden |
| 33 | Ellen Dingwall | 62 | Wife | House Work | Iowa |
| 34 | Jennie Riney | 71 | Head | House Work | Iowa |
| 35 | Roy R. Berg | 35 | Head | Restaurant & Drug Store | Iowa |
| 36 | Mildred C. Berg | 32 | Wife | House Work | Kansas |
| 37 | Ruth M. Berg | 6 | Daughter | — | Iowa |
| 38 | Henry Berg | 75 | Father | — | Germany |
| 39 | Amelia Berg | 60 | Mother | House Work | Germany |
| 40 | Glen C. Smith | 53 | Head | Oil Station | 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)