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Frank Gray — 1940 US Census Record
Model Tree available1940 United States Federal Census · Woodbury-County, Iowa
Our Model Tree links this Frank Gray across the 1920, 1930 and 1940 US Censuses in Woodbury-County, Iowa (XGBoost, ~Confirmed), with identified parents Millard & Alma — first a son (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Woodbury-County, Iowa |
| Surname | Gray |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Liston Township |
| 1935 Residence (County) | Woodbury |
| Additional Details | |
| Occupation | Bridge builder |
| Industry | Woodbury County |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 258 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Bridge Builder |
| Township / Ward | Liston Township |
| Est. Birth Year | ~1912 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Frank Gray | Son | — | 28 | ~1912 |
| Alma Gray | Spouse | — | 58 | ~1882 |
| Millard Gray | Head | — | 61 | ~1879 |
| Millard Gray | Son | — | 19 | ~1921 |
Census Appearances
1920
Woodbury, Iowa
Son, age 8
Woodbury, Iowa · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gray |
| Given Name | Frank J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Woodbury, Iowa
Son, age 18
Woodbury, Iowa · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gray |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Woodbury-County, Iowa
Son, age 28
Woodbury-County, Iowa · implied b. ~1912 — 4 household members
| Surname | Gray |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Liston Township |
| 1935 Residence (County) | Woodbury |
| Occupation | Bridge builder |
| Industry | Woodbury County |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 258 |
| Highest Grade | Hs 4 |
| 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 Frank Gray across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Millard Gray (~0.92 confidence) and mother Alma Gray (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Millard Gray
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Alma Gray
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Frank Gray
Son · 1940 · age 28 · b. ~1912 · Iowa
★ You are viewing this record
Sibling
Millard Gray
Sibling · 1940 · age 19
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 — Woodbury-County, Iowa
Open full size
1940 US Federal Census — Woodbury-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01214-00325)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harold Streichlerth | Streichlerth | 34 | Head | Farming | Iowa |
| 2 | Elvira Streichlerth | Streichlerth | 27 | Wife | — | Iowa |
| 3 | Donald Streichlerth | Streichlerth | 6 | Son | — | Iowa |
| 4 | Willis Streichlerth | Streichlerth | 2 | Son | — | Iowa |
| 5 | Orville Swanson | 58 | Head | Farming | Iowa |
| 6 | Alma Swanson | 50 | Wife | — | Oregon |
| 7 | Wayne Swanson | 23 | Son | Farm Laborer | Iowa |
| 8 | Russell Swanson | 19 | Son | Farm Laborer | Iowa |
| 9 | Sterling Swanson | 18 | Son | Farm Laborer | Iowa |
| 10 | Harriett Swanson | 15 | Daughter | — | Iowa |
| 11 | Verla Swanson | 11 | Daughter | — | Iowa |
| 12 | Carl Sohm | 35 | Head | Farming | Iowa |
| 13 | Margaret Sohm | 27 | Wife | — | Iowa |
| 14 | Richard Sohm | 1 | Son | — | Iowa |
| 15 | Marshall Sohm | 0 | Son | — | Iowa |
| 16 | Charles Erlemeier | 36 | Head | Farming | Iowa |
| 17 | Amelia Erlemeier | 35 | Wife | — | Iowa |
| 18 | Virginia Erlemeier | 10 | Daughter | — | Iowa |
| 19 | Fredrick Erlemeier | 7 | Son | — | Iowa |
| 20 | Marion Erlemeier | 5 | Daughter | — | Iowa |
| 21 | Lester Erlemeier | 4 | Son | — | Iowa |
| 22 | Carol Erlemeier | 2 | Daughter | — | Iowa |
| 23 | Millard Gray | 61 | Head | Farming | Iowa |
| 24 | Alma Gray | 58 | Wife | — | Iowa |
| 25 | Frank Gray THIS PERSON | 28 | Son | Bridge Builder | Iowa |
| 26 | Millard Jr. Gray | 19 | Son | Farm Laborer | Iowa |
| 27 | Alvin Trindle | 43 | Head | Salesman | Iowa |
| 28 | Edna Trindle | 39 | Wife | — | Iowa |
| 29 | Henry Peters | 35 | Head | W.P.A. | Iowa |
| 30 | Olive Peters | 30 | Wife | — | Iowa |
| 31 | Betty Peters | 8 | Daughter | — | Iowa |
| 32 | Helen Peters | 6 | Daughter | — | Iowa |
| 33 | Barbara Peters | 5 | Daughter | — | Iowa |
| 34 | Earl Loney | 46 | Head | Farming | Iowa |
| 35 | Marie Loney | 45 | Wife | — | Iowa |
| 36 | Earl Jr. Loney | 20 | Son | Farm Laborer | Iowa |
| 37 | George Nessner | 38 | Head | Farming | Iowa |
| 38 | Agnes Nessner | 39 | Wife | — | Denmark |
| 39 | Peter Nessner | 49 | Brother | Farm Laborer | Iowa |
| 40 | Dan Drea | 40 | Head | Farming | Iowa |
Pedigree Summary
Frank + 1 sibling
Gen 1 · 2 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)