AS
Alvin Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Ohio
Our Model Tree links this Alvin Smith across the 1920, 1930 and 1940 US Censuses in Washington-County, Ohio (XGBoost, ~Confirmed), with identified parents Ludlow & L — first a head (b.~1905), then head of a 5-person household.
Age 35
b. ~1905
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Ohio |
| Surname | Smith |
| Given Name | Alvin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Watertown |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 402 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Laborer |
| Township / Ward | Watertown |
| Est. Birth Year | ~1905 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Alvin | Age | Birth yr |
|---|---|---|---|---|
| William Smith | Son | — | 13 | ~1927 |
| Helen Smith | Spouse | — | 34 | ~1906 |
| Alvin Smith | Head | — | 35 | ~1905 |
| Dora Smith | Daughter | — | 4 | ~1936 |
| Laura Smith | Daughter | — | 11 | ~1929 |
Census Appearances
1920
Washington, Ohio
Son, age 15
Washington, Ohio · implied b. ~1905 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Alvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Washington, Ohio
Son, age 25
Washington, Ohio · implied b. ~1905 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Alvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 21 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Washington-County, Ohio
Head, age 35
Washington-County, Ohio · implied b. ~1905 — 5 household members
| Surname | Smith |
| Given Name | Alvin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Watertown |
| 1935 Residence (County) | Washington |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 402 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Alvin Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Ludlow Smith (~0.92 confidence) and father L Smith (~0.92 confidence) and mother Mattie Smith (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ludlow Smith
b. ~1868
Source father
● Household
· direct · ~0.92
Father
L Smith
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Mattie Smith
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Alvin Smith
Head · 1940 · age 35 · b. ~1905 · Ohio
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Washington-County, Ohio
Open full size
1940 US Federal Census — Washington-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03166-00524)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alvin Smith THIS PERSON | 35 | Head | Laborer | Ohio |
| 42 | Helen Smith | 34 | Wife | Housewife | Ohio |
| 43 | William L. Smith | 13 | Son | — | Ohio |
| 44 | Laura M. Smith | 11 | Daughter | — | Ohio |
| 45 | Dora Jane Smith | 4 | Daughter | — | Ohio |
| 46 | Clarence P. Arnold | 35 | Head | Laborer | Ohio |
| 47 | Hilda Arnold | 26 | Wife | — | Ohio |
| 48 | Ralph Arnold | 3 | Son | — | Ohio |
| 49 | Richard Arnold | 2 | Son | — | Ohio |
| 50 | Doris Arnold | 1 | Daughter | — | Ohio |
| 51 | Mahlon Dining | 73 | Head | Laborer | Ohio |
| 52 | Newell Dining | 37 | Son | Laborer | Ohio |
| 53 | Jessie G. Dillehay | 64 | Head | Laborer | Ohio |
| 54 | Adda Dillehay | 62 | Wife | — | Ohio |
| 55 | Gilbert Dillehay | 28 | Son | Laborer | Ohio |
| 56 | Luke E. Miller | 61 | Head | — | Ohio |
| 57 | Harley Miller | 36 | Son | Laborer | Ohio |
| 58 | Eugene Miller | 29 | Son | Laborer | Ohio |
| 59 | Pearl M. Miller | 20 | Daughter | — | Ohio |
| 60 | Earl Miller | 20 | Son | Laborer | Ohio |
| 61 | William Coffey | 65 | Head | Laborer | Ohio |
| 62 | John Henry | 66 | Head | Laborer | Ohio |
| 63 | Maud Henry | 58 | Sister | — | Ohio |
| 64 | Perley E. Irish | 60 | Head | Laborer | Ohio |
| 65 | William Miller | 78 | Head | Laborer | Ohio |
| 66 | Jessie Miller | 74 | Wife | — | Ohio |
| 67 | Walter Miller | 39 | Son | Laborer | Ohio |
| 68 | Howard Miller | 30 | Son | Laborer | Ohio |
| 69 | Rosa E. Menir | 60 | Head | — | Ohio |
| 70 | Chas. Menir | 32 | Son | Laborer | Ohio |
| 71 | Leander Menir | 27 | Son | Laborer | Ohio |
| 72 | Sylvia Menir | 23 | Daughter | — | Ohio |
| 73 | Walter Henry | 39 | Head | Laborer | Ohio |
| 74 | Martha Henry | 33 | Wife | — | Ohio |
| 75 | Dean Henry | 8 | Son | — | Ohio |
| 76 | Gale Henry | 3 | Son | — | Ohio |
| 77 | James W. Dawkins | 29 | Head | Laborer | Ohio |
| 78 | Mildred Dawkins | 22 | Wife | — | Ohio |
| 79 | James L. Dawkins | 3 | Son | — | Ohio |
| 80 | Francine Dawkins | 1 | Daughter | — | Ohio |
Pedigree Summary
Alvin
Gen 1 · 3 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)