DS
David Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this David Smith across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed), with identified parents Jos & Joseph — first a son (b.~1905), then head of a 7-person household.
Age 35
b. ~1905
Male
Son
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Smith |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Gravois Township |
| 1935 Residence (County) | St. Louis |
| Additional Details | |
| Occupation | hod carrier |
| Industry | private plasterer |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 1989 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Hod Carrier |
| Township / Ward | Gravois Township |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Mary Smith | Daughter | — | 18 | ~1922 |
| Joseph Smith | Head | — | 63 | ~1877 |
| Delores Smith | Other | — | 12 | ~1928 |
| Charles Smith | Other | — | 14 | ~1926 |
| Jesse Smith | Son | — | 37 | ~1903 |
| David Smith | Son | — | 35 | ~1905 |
| Mary Smith | Spouse | — | 61 | ~1879 |
Census Appearances
1920
St Louis, …
Son, age 15
St Louis, Missouri · implied b. ~1905 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Student |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
St Louis, …
Son, age 25
St Louis, Missouri · implied b. ~1905 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | David A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Iron worker |
| Industry | Construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-County, Missouri
Son, age 35
St.-Louis-County, Missouri · implied b. ~1905 — 7 household members
| Surname | Smith |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Gravois Township |
| 1935 Residence (County) | St. Louis |
| Occupation | hod carrier |
| Industry | private plasterer |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 1989 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Jos Smith (~0.92 confidence) and father Joseph Smith (~0.92 confidence) and father Joseph Smith (~0.92 confidence) and mother Mary Smith (~0.92 confidence) and mother Mary Smith (~0.92 confidence) and mother Mary Smith (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jos Smith
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Joseph Smith
b. ~1867
Source father
● Household
· direct · ~0.92
Father
Joseph Smith
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Mary Smith
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Mary Smith
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Mary Smith
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Smith
Son · 1940 · age 35 · b. ~1905 · Missouri
★ You are viewing this record
Sibling
Jesse Smith
Sibling · 1940 · age 37
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Smith
Sibling · 1940 · age 18
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 — St.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02150-00240)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joyce Cortel | 3 | Daughter | — | Missouri |
| 42 | Carol Cortel | 1 | Daughter | — | Missouri |
| 43 | Nancy Rince | 63 | Mother | — | Missouri |
| 44 | John Firolo | 55 | Head | Laborer | Czechoslovakia |
| 45 | Anna Firolo | 53 | Wife | — | Czechoslovakia |
| 46 | Emily Firolo | 23 | Daughter | Seamstress | Missouri |
| 47 | William Firolo | 21 | Son | Washer | Missouri |
| 48 | Helen Firolo | 19 | Daughter | Machine Girl | Missouri |
| 49 | Susie Firolo | 17 | Daughter | — | Missouri |
| 50 | Anna Firolo | 15 | Daughter | — | Missouri |
| 51 | Margaret Firolo | 13 | Daughter | — | Missouri |
| 52 | Martin Firolo | 10 | Son | — | Missouri |
| 53 | Anthony Treybal | 36 | Head | Tester | Czechoslovakia |
| 54 | Elizabeth Treybal | 29 | Wife | — | Missouri |
| 55 | Jeannette Treybal | 6 | Daughter | — | Missouri |
| 56 | Hubert Ford | 40 | Head | Painter | Indiana |
| 57 | Bernice Ford | 39 | Wife | — | Illinois |
| 58 | Myrtle Ford | 14 | Daughter | — | Illinois |
| 59 | Elsie Ford | 10 | Daughter | — | Illinois |
| 60 | Kathleen Ford | 2 | Daughter | — | Illinois |
| 61 | Hubert Ford | 17 | Son | Painter | Illinois |
| 62 | Edna Ford | 18 | Daughter | House Girl | Illinois |
| 63 | John Yavarsky | 37 | Head | Truck Driver | Czechoslovakia |
| 64 | Danny Yavarsky | 10 | Daughter | — | Missouri |
| 65 | Joseph A. Smith | 63 | Head | — | Missouri |
| 66 | Mary Smith | 61 | Wife | — | Missouri |
| 67 | Jesse Smith | 37 | Son | Sign Washer | Missouri |
| 68 | David Smith THIS PERSON | 35 | Son | Hod Carrier | Missouri |
| 69 | Mary Smith | 18 | Daughter | New Worker | Missouri |
| 70 | Charles Smith | 14 | Grandson | — | Missouri |
| 71 | Delores Smith | 12 | Granddaughter | — | Missouri |
| 72 | John Milshadan | 70 | Head | — | Illinois |
| 73 | Emma Milshadan | 66 | Wife | — | Illinois |
| 74 | James Milshadan | 19 | Son | New Worker | Missouri |
| 75 | Harry Hutchins | 56 | Nephew | New Worker | Illinois |
| 76 | Roy Hutchins | 45 | Nephew | — | Illinois |
| 77 | John Woshacka | 29 | Head | Laborer | Missouri |
| 78 | Ruth Woshacka | 19 | Wife | — | Illinois |
| 79 | Frances Woshacka | 2 | Daughter | — | Missouri |
| 80 | John Woshacka | 1 | Son | — | Missouri |
Pedigree Summary
David + 2 siblings
Gen 1 · 6 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)