AS
Andrew Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Humboldt-County, Iowa
Our Model Tree links this Andrew Smith across the 1910, 1920, 1930 and 1940 US Censuses in Humboldt-County, Iowa (XGBoost, ~Confirmed), with identified parents Hugh — first a head (b.~1878), then head of a 6-person household.
Age 62
b. ~1878
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Humboldt-County, Iowa |
| Surname | Smith |
| Given Name | Andrew |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Humboldt |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | O |
| Hours Worked | 50 |
| Income (1939) | 552 |
| Highest Grade | 4 |
| 1935 Residence | Iowa |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farmer |
| Township / Ward | Avery Township |
| Est. Birth Year | ~1878 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Andrew | Age | Birth yr |
|---|---|---|---|---|
| Elma Smith | Daughter | — | 16 | ~1924 |
| Andrew Smith | Head | — | 62 | ~1878 |
| Harvey Smith | Son | — | 18 | ~1922 |
| Vern Smith | Son | — | 20 | ~1920 |
| Donald Smith | Son | — | 20 | ~1920 |
| Olive Smith | Spouse | — | 46 | ~1894 |
Census Appearances
1910
Humboldt, Iowa
Son, age 32
Humboldt, Iowa · implied b. ~1878 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Andrew J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Germany |
| Mother's Birthplace | Denmark |
| Occupation | Farmer |
| Industry | General farm |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Humboldt, Iowa
Head, age 42
Humboldt, Iowa · implied b. ~1878 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Andrew |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Farmer |
| Industry | Gen Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Humboldt, Iowa
Head, age 52
Humboldt, Iowa · implied b. ~1878 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Andrew |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 41 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Humboldt-County, Iowa
Head, age 62
Humboldt-County, Iowa · implied b. ~1878 — 6 household members
| Surname | Smith |
| Given Name | Andrew |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Humboldt |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | O |
| Hours Worked | 50 |
| Income (1939) | 552 |
| Highest Grade | 4 |
| 1935 Residence | Iowa |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Andrew Smith across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Hugh Smith (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Hugh Smith
b. ~1841
Source father
● Household
· direct · ~0.92
This person
Anchor record
Andrew Smith
Head · 1940 · age 62 · b. ~1878 · Iowa
★ 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 — Humboldt-County, Iowa
Open full size
1940 US Federal Census — Humboldt-County, Iowa
Page Contents
11 people indexed on this census page (nara:1940:m-t0627-01167-00452)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Cora Carlson | 40 | Wife | — | Iowa |
| 2 | Edward Carlson | 15 | Son | — | Iowa |
| 3 | Dean Carlson | 9 | Son | — | Iowa |
| 4 | Joan Patricia Carlson | 5 | Daughter | — | Iowa |
| 5 | Elmer Fuller | 25 | Lodger | Laborer | Kansas |
| 6 | Andrew Smith THIS PERSON | 62 | Head | Farmer | Illinois |
| 7 | Olive Smith | 46 | Wife | — | Iowa |
| 8 | Donald Smith | 20 | Son | Laborer | Iowa |
| 9 | Vern Smith | 20 | Son | Laborer | Iowa |
| 10 | Harvey Smith | 18 | Son | Laborer | Iowa |
| 11 | Elma Smith | 16 | Daughter | — | Iowa |
Pedigree Summary
Andrew
Gen 1 · 1 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)