RS
Ruth Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Iowa
Our Model Tree links this Ruth Smith across the 1920, 1930 and 1940 US Censuses in Marion-County, Iowa (XGBoost, ~Confirmed), with identified parents Stanley & Stanley — first a daughter (b.~1911), then head of a 5-person household.
Age 29
b. ~1911
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Iowa |
| Surname | Smith |
| Given Name | Ruth A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Indiana Twp. |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Teacher |
| Industry | Rural School |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 675 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Teacher |
| Township / Ward | Indiana Twp |
| Est. Birth Year | ~1911 |
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 Ruth | Age | Birth yr |
|---|---|---|---|---|
| Ruth Smith | Daughter | — | 29 | ~1911 |
| Stanley Smith | Head | — | 51 | ~1889 |
| Marion Dooley | Other | — | 50 | ~1890 |
| Orville Smith | Son | — | 24 | ~1916 |
| Effie Smith | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Marion, Iowa
Daughter, age 8
Marion, Iowa · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Marion, Iowa
Daughter, age 18
Marion, Iowa · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | S. Dakot |
| Occupation | Teacher |
| Industry | School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Marion-County, Iowa
Daughter, age 29
Marion-County, Iowa · implied b. ~1911 — 5 household members
| Surname | Smith |
| Given Name | Ruth A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Indiana Twp. |
| 1935 Residence (County) | Marion |
| Occupation | Teacher |
| Industry | Rural School |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 675 |
| Highest Grade | C-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 Ruth Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Stanley Smith (~0.92 confidence) and father Stanley Smith (~0.92 confidence) and mother Ethel Smith (~0.92 confidence) and mother Effie Smith (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Stanley Smith
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Stanley Smith
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Ethel Smith
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Effie Smith
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ruth Smith
Daughter · 1940 · age 29 · b. ~1911 · Iowa
★ You are viewing this record
Sibling
Orville Smith
Sibling · 1940 · age 24
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 — Marion-County, Iowa
Open full size
1940 US Federal Census — Marion-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01181-00165)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Orrie T Noah | 21 | Head | Farmer | Iowa |
| 2 | Vera Noah | 23 | Wife | — | Iowa |
| 3 | Everett P Mallory | 43 | Head | Farmer | Iowa |
| 4 | Olive A Mallory | 40 | Wife | — | Iowa |
| 5 | Dale W Mallory | 19 | Son | Farmer | Iowa |
| 6 | Norma J Mallory | 15 | Daughter | — | Iowa |
| 7 | Donald W Mallory | 12 | Son | — | Iowa |
| 8 | Loretta J Mallory | 9 | Daughter | — | Iowa |
| 9 | Stanley L Smith | 51 | Head | Farmer | Iowa |
| 10 | Effie E Smith | 50 | Wife | — | Dakota |
| 11 | Marion Dooley | 50 | Hired Hand | Laborer | Missouri |
| 12 | Ruth A Smith THIS PERSON | 29 | Daughter | Teacher | Iowa |
| 13 | Orville A Smith | 24 | Son | Laborer | Iowa |
| 14 | Harley P Swain | 58 | Head | Farmer | Ohio |
| 15 | Alice E Swain | 54 | Wife | — | Iowa |
| 16 | Oscar M Etcher | 60 | Head | Farmer | Iowa |
| 17 | Ella D Etcher | 59 | Wife | — | Iowa |
| 18 | Samuel E Brane | 65 | Head | Farmer | Iowa |
| 19 | Isaac W Applegate | 83 | Head | Farmer | Iowa |
| 20 | Alda M Whitlatch | 61 | Daughter | — | Iowa |
| 21 | Walter G Beaver | 47 | Head | Farmer | Iowa |
| 22 | Ruth E Beaver | 43 | Wife | — | Iowa |
| 23 | Herbert E Beaver | 21 | Son | Office Clerk | Iowa |
| 24 | Dorothy M Beaver | 20 | Daughter | — | Iowa |
| 25 | Harold E Beaver | 14 | Son | — | Iowa |
| 26 | Helen C Beaver | 10 | Daughter | — | Iowa |
| 27 | Nellie M Beaver | 70 | Mother | — | Illinois |
| 28 | Raymond Parker | 37 | Hired Hand | Laborer | Iowa |
| 29 | Martin T Bridges | 64 | Head | Farmer | Iowa |
| 30 | Stella M Bridges | 59 | Wife | — | Iowa |
| 31 | John E Bardrick | 56 | Head | Farmer | Iowa |
| 32 | Cora E Bardrick | 55 | Wife | — | Iowa |
| 33 | Herbert F Bardrick | 32 | Son | Farmer | Iowa |
| 34 | Veda C Bardrick | 14 | Daughter | — | Iowa |
| 35 | Virgil J Martin | 32 | Head | Laborer | Indiana |
| 36 | Myrna M Martin | 31 | Wife | — | Iowa |
| 37 | Deloris E Martin | 11 | Daughter | — | Iowa |
| 38 | Velda E Martin | 9 | Daughter | — | Iowa |
| 39 | Dotha J Martin | 8 | Daughter | — | Iowa |
| 40 | Maxella L Martin | 5 | Daughter | — | Iowa |
Pedigree Summary
Ruth + 1 sibling
Gen 1 · 4 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)