RC
Robert Carlson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Crawford-County, Iowa
Our Model Tree links this Robert Carlson across the 1920, 1930 and 1940 US Censuses in Crawford-County, Iowa (XGBoost, ~Confirmed), with identified parents Albin & A — first a son (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Crawford-County, Iowa |
| Surname | Carlson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Paradise |
| 1935 Residence (County) | Crawford |
| Additional Details | |
| Occupation | farm laborer |
| Industry | farm |
| Class of Worker | NP |
| Hours Worked | 60 |
| Income (1939) | 500 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farm Laborer |
| Township / Ward | Paradise |
| Est. Birth Year | ~1919 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Marion Carlson | Daughter | — | 25 | ~1915 |
| Beryl Carlson | Son | — | 16 | ~1924 |
| Robert Carlson | Son | — | 21 | ~1919 |
| Delores Carlson | Daughter | — | 11 | ~1929 |
| Alice Carlson | Spouse | — | 56 | ~1884 |
| Alvin Carlson | Head | — | 57 | ~1883 |
Census Appearances
1920
Crawford, Iowa
Son, age 1
Crawford, Iowa · implied b. ~1919 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Indiana |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Crawford, Iowa
Son, age 11
Crawford, Iowa · implied b. ~1919 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| 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
Crawford-County, Iowa
Son, age 21
Crawford-County, Iowa · implied b. ~1919 — 6 household members
| Surname | Carlson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Paradise |
| 1935 Residence (County) | Crawford |
| Occupation | farm laborer |
| Industry | farm |
| Class of Worker | NP |
| Hours Worked | 60 |
| Income (1939) | 500 |
| Highest Grade | No 8 |
| 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 Robert Carlson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Albin Carlson (~0.92 confidence) and father A Carlson (~0.92 confidence) and mother Alice Carlson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albin Carlson
b. ~1863
Source father
● Household
· direct · ~0.92
Father
A Carlson
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Alice Carlson
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Carlson
Son · 1940 · age 21 · b. ~1919 · Iowa
★ You are viewing this record
Sibling
Delores Carlson
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beryl Carlson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Carlson
Sibling · 1940 · age 25
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 — Crawford-County, Iowa
Open full size
1940 US Federal Census — Crawford-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01152-00464)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Albert Mathis | 44 | Head | Farm Manager | Switzerland |
| 2 | John Thomsen | 67 | Head | Farmer | Germany |
| 3 | Lizzie Thomsen | 59 | Wife | — | Germany |
| 4 | Anna Thomsen | 32 | Daughter | — | Iowa |
| 5 | Peter Thomsen | 24 | Son | Farm Partner | Iowa |
| 6 | Bertha Thomsen | 23 | Daughter | — | Iowa |
| 7 | Thomas Thomsen | 21 | Son | Farm Partner | Iowa |
| 8 | Louis Wright | 41 | Head | Farmer | Iowa |
| 9 | Mary Wright | 38 | Wife | — | Iowa |
| 10 | Ellen May Wright | 16 | Daughter | — | Iowa |
| 11 | Gassy Wright | 15 | Daughter | — | Iowa |
| 12 | Margaret Wright | 14 | Daughter | — | Iowa |
| 13 | Doris Wright | 13 | Daughter | — | Iowa |
| 14 | Marine Wright | 9 | Daughter | — | Iowa |
| 15 | Alvin Carlson | 57 | Head | Farmer | Iowa |
| 16 | Alice Carlson | 56 | Wife | — | Iowa |
| 17 | Marion Carlson | 25 | Daughter | Np | Iowa |
| 18 | Robert Carlson THIS PERSON | 21 | Son | Farm Laborer | Iowa |
| 19 | Beryl Carlson | 16 | Son | — | Iowa |
| 20 | Delores Carlson | 11 | Daughter | — | Iowa |
| 21 | John F. Holst | 37 | Head | Farmer | Iowa |
| 22 | Ida Holst | 37 | Wife | — | Minnesota |
| 23 | John Jr. Holst | 14 | Son | Laborer | Iowa |
| 24 | Fred Holst | 12 | Son | — | Iowa |
| 25 | Phyllis Holst | 9 | Daughter | — | Iowa |
| 26 | Henry Preul | 40 | Head | Farmer | Iowa |
| 27 | Florence Preul | 34 | Wife | — | Iowa |
| 28 | Adelbert Preul | 16 | Son | Farm Laborer | Iowa |
| 29 | Rovanis Preul | 4 | Son | — | Iowa |
| 30 | Janis Preul | 2 | Daughter | — | Iowa |
| 31 | Fannie Preul | 65 | Mother | — | Germany |
| 32 | August Maack | 31 | Head | Farmer | Iowa |
| 33 | Irene Maack | 29 | Wife | — | Iowa |
| 34 | Janice Maack | 3 | Daughter | — | Iowa |
| 35 | Myron Maack | 1 | Son | — | Iowa |
| 36 | Albie Maack | 0 | Daughter | — | Iowa |
| 37 | Charles Gollhofer | 21 | Hired hand | Farm Laborer | Iowa |
| 38 | Marjorie Greent | 19 | Hired girl | Servant | S. Dakota |
| 39 | Louis Bohlander | 60 | Head | Farmer | Iowa |
| 40 | Alvina Bohlander | 58 | Wife | — | Iowa |
Related Census Records
Pedigree Summary
Robert + 3 siblings
Gen 1 · 3 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)