CM
Carl Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Pennington-County, South Dakota
Our Model Tree links this Carl Martin across the 1930 and 1940 US Censuses in Pennington-County, South Dakota (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 6-person household.
Age 14
b. ~1926
Male
Son
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Pennington-County, South Dakota |
| Surname | Martin |
| Given Name | Carl F. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Township 1 South Range 4 |
| 1935 Residence (County) | Pennington |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | Township 1 South Range 4 |
| Est. Birth Year | ~1926 |
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 Carl | Age | Birth yr |
|---|---|---|---|---|
| Carl Martin | Son | — | 14 | ~1926 |
| Alfred Martin | Head | — | 54 | ~1886 |
| Idella Martin | Spouse | — | 31 | ~1909 |
| Alma Martin | Daughter | — | 8 | ~1932 |
| Clay Martin | Son | — | 16 | ~1924 |
| Louise Martin | Daughter | — | 2 | ~1938 |
Census Appearances
1930
Pennington, South …
Son, age 3
Pennington, South Dakota · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Carl L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Denmark |
| Mother's Birthplace | South Dakota |
| Occupation | none |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Pennington-County, South …
Son, age 14
Pennington-County, South Dakota · implied b. ~1926 — 6 household members
| Surname | Martin |
| Given Name | Carl F. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Township 1 South Range 4 |
| 1935 Residence (County) | Pennington |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Carl Martin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Carl Martin
Son · 1940 · age 14 · b. ~1926 · South Dakota
★ You are viewing this record
Sibling
Louise Martin
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alma Martin
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clay Martin
Sibling · 1940 · age 16
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 — Pennington-County, South Dakota
Open full size
1940 US Federal Census — Pennington-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03865-01013)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Vonde-Lee | 2 | daughter | — | South Dakota |
| 2 | Verna E. | 0 | daughter | — | South Dakota |
| 3 | Thomas J. Gorman | 36 | head | Teamster | South Dakota |
| 4 | Millicent M. Gorman | 36 | wife | — | North Dakota |
| 5 | Mary K. Gorman | 9 | daughter | — | South Dakota |
| 6 | Phyllis E. Gorman | 7 | daughter | — | South Dakota |
| 7 | Thomas J. Gorman | 5 | son | — | South Dakota |
| 8 | Gustav A. Yuntmeyer | 54 | head | Common Laborer | Missouri |
| 9 | Katie Yuntmeyer | 51 | wife | — | Missouri |
| 10 | Lester T. Yuntmeyer | 21 | son | Odd Jobs | Missouri |
| 11 | Alfred T. Martin | 54 | head | Common Laborer | Denmark |
| 12 | Idella Mae Martin | 31 | wife | — | South Dakota |
| 13 | Clay W. Martin | 16 | son | — | South Dakota |
| 14 | Carl F. Martin THIS PERSON | 14 | son | — | South Dakota |
| 15 | Alma A. Martin | 8 | daughter | — | South Dakota |
| 16 | Louise E. Martin | 2 | daughter | — | South Dakota |
| 17 | Renel E. Roth | 56 | head | Farmer | Nebraska |
| 18 | Grace W. Roth | 46 | wife | — | South Dakota |
| 19 | Elmer R. Roth | 11 | son | — | South Dakota |
| 20 | Albert H. De Witt | 29 | head | Timber Work | South Dakota |
| 21 | Vivian V. De Witt | 27 | wife | — | Iowa |
| 22 | Jeannine L. De Witt | 8 | daughter | — | South Dakota |
| 23 | Clarence A. De Witt | 6 | son | — | South Dakota |
| 24 | Raymond E. Reut | 22 | lodger | Timber Work | South Dakota |
| 25 | Idris G. Reut | 19 | lodger | — | South Dakota |
| 26 | Lewis G. Davis | 59 | head | Engineer | Kentucky |
| 27 | Rose M. Davis | 28 | wife | — | Missouri |
| 28 | George H. Daniels | 24 | brother | Cutting Logs | Missouri |
| 29 | Roy A. Daniels | 21 | brother | Cutting Logs | Missouri |
| 30 | Mattie M. Williamson | 59 | head | — | Missouri |
| 31 | William H. Williamson | 39 | son | Mechanic | South Dakota |
| 32 | Abram T. Miller | 85 | father | — | Pennsylvania |
| 33 | Sol Nelson | 82 | head | Farmer | Sweden |
| 34 | Rosa M. Nelson | 63 | wife | — | Massachusetts |
| 35 | Robert H. Nelson | 34 | son | Section Foreman | South Dakota |
| 36 | Anna Anderson | 85 | mother-in-law | — | Germany |
| 37 | Olaf A. Hagen | 50 | head | Grader Man | South Dakota |
| 38 | Mamie K. Hagen | 46 | wife | — | South Dakota |
| 39 | Roy O. Hagen | 14 | son | — | South Dakota |
| 40 | Eva T. Hagen | 9 | daughter | — | South Dakota |
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)