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Jack Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Fremont-County, Iowa
Our Model Tree links this Jack Martin across the 1930 and 1940 US Censuses in Fremont-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 5-person household.
Age 11
b. ~1929
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Fremont-County, Iowa |
| Surname | Martin |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Hamburg Town |
| 1935 Residence (County) | Fremont |
| Additional Details | |
| Highest Grade | S 5 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Hamburg Town |
| Est. Birth Year | ~1929 |
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 Jack | Age | Birth yr |
|---|---|---|---|---|
| Lucy Martin | Spouse | — | 37 | ~1903 |
| Cherill Martin | Son | — | 13 | ~1927 |
| Marlene Martin | Daughter | — | 9 | ~1931 |
| Clair Martin | Head | — | 41 | ~1899 |
| Jack Martin | Son | — | 11 | ~1929 |
Census Appearances
1930
Fremont, Iowa
Son, age 1
Fremont, Iowa · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Fremont-County, Iowa
Son, age 11
Fremont-County, Iowa · implied b. ~1929 — 5 household members
| Surname | Martin |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Hamburg Town |
| 1935 Residence (County) | Fremont |
| Highest Grade | S 5 |
| 1935 Residence | Iowa |
| 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 Jack Martin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Jack Martin
Son · 1940 · age 11 · b. ~1929 · Iowa
★ You are viewing this record
Sibling
Marlene Martin
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cherill Martin
Sibling · 1940 · age 13
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 — Fremont-County, Iowa
Open full size
1940 US Federal Census — Fremont-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01162-00080)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marilyn Thomas | 10 | Daughter | — | Iowa |
| 2 | Lawrence Delunn | 38 | Head | Car Salesman | Nebraska |
| 3 | Willie Kay Delunn | 37 | Wife | — | Missouri |
| 4 | Caroline Delunn | 80 | Mother | — | Wisconsin |
| 5 | Clair Martin | 41 | Head | Operator | Missouri |
| 6 | Lucy Martin | 37 | Wife | — | Missouri |
| 7 | Cherill Martin | 13 | Son | — | Iowa |
| 8 | Jack Martin THIS PERSON | 11 | Son | — | Iowa |
| 9 | Marlene Martin | 9 | Daughter | — | Iowa |
| 10 | Nolan Black | 35 | Head | Feed Grinder | Iowa |
| 11 | Irene Black | 31 | Wife | — | Iowa |
| 12 | Lulu L. West | 59 | Head | Teacher | Iowa |
| 13 | Line Left Vacant By Error | None | — | — | — |
| 14 | William Dattoche | 60 | Head | Farmer | Iowa |
| 15 | Glady Dattoche | 48 | Wife | Music Teacher | Iowa |
| 16 | Billy Dattoche | 22 | Son | Farmer | Iowa |
| 17 | Marion Dattoche | 12 | Daughter | — | Iowa |
| 18 | Michael Miller | 43 | Head | Field Farmer Man | Missouri |
| 19 | Nella O. Miller | 41 | Wife | — | Kansas |
| 20 | Betty Miller | 18 | Daughter | — | Iowa |
| 21 | Herman Selzman | 29 | Head | Grocery Clerk | Iowa |
| 22 | Dorothy C. Selzman | 29 | Wife | — | Nebraska |
| 23 | Ruth Selzman | 6 | Daughter | — | Iowa |
| 24 | Clair Selzman | 5 | Son | — | Iowa |
| 25 | Margaret Selzman | 2 | Daughter | — | Iowa |
| 26 | Mellie Pauley | 68 | Head | — | Illinois |
| 27 | Ray Baldwin | 45 | Head | Owner & Operator | Iowa |
| 28 | Gertrude Baldwin | 45 | Wife | — | Iowa |
| 29 | Josephine Baldwin | 17 | Daughter | New Worker | Iowa |
| 30 | Robert S. Baldwin | 13 | Son | — | Iowa |
| 31 | Louise Mcadoo | 72 | Mother-in-law | — | Iowa |
| 32 | Frank Castleman | 54 | Head | Coal Dealer | Nebraska |
| 33 | Edgarla Castleman | 54 | Wife | — | Kansas |
| 34 | Clarence Castleman | 19 | Son | — | Iowa |
| 35 | Florence Speaks | 81 | Mother-in-law | — | Illinois |
| 36 | Cline Lynn | 64 | Head | Farmer | Tennessee |
| 37 | Ora Lynn | 46 | Wife | — | Missouri |
| 38 | Eula Lynn | 26 | Daughter | Sewing Project | Missouri |
| 39 | Glen Lynn | 19 | Son | Farm Laborer | Missouri |
| 40 | W. C. Lynn | 15 | Son | New Worker | Missouri |
Related Census Records
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)