DS
David Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Ohio
Our Model Tree links this David Smith across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Son
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Ohio |
| Surname | Smith |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Dayton |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Punch Press ops |
| Industry | Machine Shop |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Punch Press Ops |
| Township / Ward | Dayton |
| Est. Birth Year | ~1909 |
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 David | Age | Birth yr |
|---|---|---|---|---|
| James Smith | Head | — | 60 | ~1880 |
| Katherine Smith | Other | — | 19 | ~1921 |
| David Smith | Son | — | 31 | ~1909 |
| Nancy Smith | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Montgomery, Ohio
Son, age 11
Montgomery, Ohio · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Montgomery, Ohio
Son, age 21
Montgomery, Ohio · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Press Operator |
| Industry | Clothing Fact. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Montgomery-County, Ohio
Son, age 31
Montgomery-County, Ohio · implied b. ~1909 — 4 household members
| Surname | Smith |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Dayton |
| 1935 Residence (County) | Montgomery |
| Occupation | Punch Press ops |
| Industry | Machine Shop |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 David Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Smith (~0.92 confidence) and father James Smith (~0.92 confidence) and father Joe Smith (~0.92 confidence) and mother Nancy Smith (~0.92 confidence) and mother Nancy Smith (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Smith
b. ~1880
Source father
● Household
· direct · ~0.92
Father
James Smith
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Joe Smith
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Nancy Smith
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Nancy Smith
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Smith
Son · 1940 · age 31 · b. ~1909 · 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 — Montgomery-County, Ohio
Open full size
1940 US Federal Census — Montgomery-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03253-01041)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William H. Linagey | 66 | Head | Tool Maker | Maryland |
| 42 | Allie R. Linagey | 61 | Wife | — | West Va. |
| 43 | Joshua B. Meeker | 40 | Lodger | Tool Maker | Kentucky |
| 44 | Irma C. Beach | 42 | Head | Binder Ops | Illinois |
| 45 | Francis Jr. Beach | 16 | Son | News Worker | Ohio |
| 46 | Jack L. Beach | 12 | Son | — | Ohio |
| 47 | Fannie Berry | 42 | Head | Ret. Clerk | Kentucky |
| 48 | William C. Berry | 21 | Son | Counter Clerk | Kentucky |
| 49 | Beulah J. Berry | 18 | Daughter | — | Ohio |
| 50 | Dorothy M. Berry | 14 | Daughter | — | Ohio |
| 51 | Donna P. Berry | 12 | Daughter | — | Ohio |
| 52 | Fannie L. Berry | 9 | Daughter | — | Ohio |
| 53 | Emil H. Stewart | 30 | Head | Pressman | Ohio |
| 54 | Opal Stewart | 37 | Wife | — | Ohio |
| 55 | June B. Stewart | 9 | Daughter | — | Ohio |
| 56 | Donald S. Stewart | 7 | Son | — | Ohio |
| 57 | Theodore P. Stewart | 77 | Father | — | Ohio |
| 58 | Gerald E. Tull | 24 | Head | Tool Grinder | Ohio |
| 59 | Elsie G. Tull | 24 | Wife | — | Kentucky |
| 60 | Douglas A. Tull | 0 | Son | — | Ohio |
| 61 | Edith South | 38 | Head | — | Missouri |
| 62 | Martha D. Crow | 14 | Daughter | — | Ohio |
| 63 | Nancy A. South | 8 | Daughter | — | Ohio |
| 64 | James Smith | 60 | Head | Laborer | Kentucky |
| 65 | Nancy A. Smith | 53 | Wife | Presser | Kentucky |
| 66 | David Smith THIS PERSON | 31 | Son | Punch Press Ops | Kentucky |
| 67 | Katherine Smith | 19 | Daughter-in-law | — | Ohio |
| 68 | Emma M. Clenell | 55 | Head | Miscellaneous | Ohio |
| 69 | Ernest G. Kohlbacher | 16 | Grandson | — | Ohio |
| 70 | Eli Hampton | 61 | Head | — | Kentucky |
| 71 | Mary H. Hampton | 34 | Wife | Laundress | Kentucky |
| 72 | Elizabeth Hampton | 11 | Daughter | — | Ohio |
| 73 | Roy L. Shank | 26 | Head | Plaster | Ohio |
| 74 | Knothy M. Shank | 19 | Wife | — | Ohio |
| 75 | Laura L. Shank | 2 | Daughter | — | Ohio |
| 76 | Lorna L. Shank | 0 | Daughter | — | Ohio |
| 77 | Irene E. Huber | 35 | Head | — | Ohio |
| 78 | George W. Huber | 16 | Son | — | Ohio |
| 79 | Leota Huber | 15 | Daughter | — | Ohio |
| 80 | Jimmie W. Huber | 12 | Son | — | Ohio |
Pedigree Summary
David
Gen 1 · 5 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)