MS
Martin Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this Martin Smith across the 1920, 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed), with identified parents Martin & Martin — first a son (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | Smith |
| Given Name | Martin L. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | C-3 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Davenport |
| Est. Birth Year | ~1918 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martin | Age | Birth yr |
|---|---|---|---|---|
| Martin Smith | Son | — | 22 | ~1918 |
| Martin Smith | Head | — | 56 | ~1884 |
| Mathilda Smith | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Scott, Iowa
Son, age 2
Scott, Iowa · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Martin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Scott, Iowa
Son, age 12
Scott, Iowa · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Martin J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Scott-County, Iowa
Son, age 22
Scott-County, Iowa · implied b. ~1918 — 3 household members
| Surname | Smith |
| Given Name | Martin L. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport |
| 1935 Residence (County) | Scott |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | C-3 |
| 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 Martin Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Martin Smith (~0.92 confidence) and father Martin Smith (~0.92 confidence) and father Martin Smith (~0.92 confidence) and mother Mathilda Smith (~0.92 confidence) and mother Mathilda Smith (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Martin Smith
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Martin Smith
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Martin Smith
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Mathilda Smith
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Mathilda Smith
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martin Smith
Son · 1940 · age 22 · b. ~1918 · 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 — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01203-00071)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jennie Rothschild | 67 | Head | — | Iowa |
| 2 | Hanna Rothschild | 63 | Sister | Stenographer | Iowa |
| 3 | Remie Derby | 43 | Maid | Maid | Illinois |
| 4 | Oscar H. Elmergreen | 44 | Head | Manager | Illinois |
| 5 | Grace Elmergreen | 40 | Wife | — | Iowa |
| 6 | Robert Elmergreen | 21 | Son | Salesman | Illinois |
| 7 | Charles Elmergreen | 14 | Son | — | Illinois |
| 8 | Arthur J. Gowan | 53 | Head | Electrical Engineer | Maine |
| 9 | Christine Gowan | 53 | Wife | — | Maine |
| 10 | St. Bruce West | 67 | Head | — | New Zealand |
| 11 | Jesse West | 70 | Wife | — | Massachusetts |
| 12 | Margaret West | 45 | Daughter | Teacher | Vermont |
| 13 | Joseph Mcrae | 46 | Head | Salesman | Minnesota |
| 14 | Cora M. Mcrae | 43 | Wife | — | Iowa |
| 15 | Martin L. Smith | 56 | Head | Vice President | Iowa |
| 16 | Mathilda Smith | 51 | Wife | — | Iowa |
| 17 | Martin L. Jr. Smith THIS PERSON | 22 | Son | — | Iowa |
| 18 | Louis N. Alexander | 51 | Head | Physician | Wisconsin |
| 19 | Gertrude Alexander | 51 | Wife | — | England |
| 20 | Roger L. Alexander | 20 | Son | — | Iowa |
| 21 | Mary O'Donnell | 75 | Head | — | Iowa |
| 22 | Margaret O'Donnell | 43 | Daughter | Teacher | Iowa |
| 23 | Alice O'Donnell | 41 | Daughter | Cashier | Iowa |
| 24 | John E. Kelley | 44 | Head | Traveling Salesman | Iowa |
| 25 | Alice Kelley | 48 | Wife | — | Illinois |
| 26 | Patricia Kelley | 4 | Daughter | — | Iowa |
| 27 | Anna M. Kelley | 74 | Mother | — | Eire |
| 28 | Joseph Deutsch | 64 | Head | Manager | Iowa |
| 29 | Della R. Deutsch | 65 | Wife | — | Iowa |
| 30 | Marcella O'Neill | 36 | Maid | Maid | Iowa |
| 31 | Elise Galinghouse | 60 | Head | — | Iowa |
| 32 | Frieda Galinghouse | 65 | Sister | — | Iowa |
| 33 | Lucille Burianek | 32 | Lodger | Teacher | Iowa |
| 34 | Janna Jacobs | 35 | Lodger | Social Worker | Iowa |
| 35 | Vacant In Error | None | — | — | — |
| 36 | Vacant In Error | None | — | — | — |
| 37 | Vacant In Error | None | — | — | — |
| 38 | Emmanuel R. Miller | 67 | Head | Publisher | Illinois |
| 39 | Mary E. Sturt | 36 | Housekeeper | Housekeeper | Austria |
Pedigree Summary
Martin
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)