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John Carlson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Webster-County, Iowa
Our Model Tree links this John Carlson across the 1920, 1930 and 1940 US Censuses in Webster-County, Iowa (XGBoost, ~Confirmed), with identified parents Anton & Victoria — 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 | Webster-County, Iowa |
| Surname | Carlson |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Fort Dodge |
| 1935 Residence (County) | Webster |
| Additional Details | |
| Highest Grade | H-3 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Fort Dodge |
| 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 John | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Carlson | Daughter | — | 18 | ~1922 |
| Doloris Carlson | Daughter | — | 16 | ~1924 |
| Doris Carlson | Daughter | — | 16 | ~1924 |
| Anton Carlson | Head | — | 51 | ~1889 |
| John Carlson | Son | — | 21 | ~1919 |
| Victoria Carlson | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Webster, Iowa
Son, age
Webster, Iowa · implied b. ~1920 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Webster, Iowa
Son, age 11
Webster, Iowa · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | John H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Webster-County, Iowa
Son, age 21
Webster-County, Iowa · implied b. ~1919 — 6 household members
| Surname | Carlson |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Fort Dodge |
| 1935 Residence (County) | Webster |
| Highest Grade | H-3 |
| 1935 Residence | Same house |
| 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 John Carlson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Anton Carlson (~0.92 confidence) and mother Victoria Carlson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Anton Carlson
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Victoria Carlson
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Carlson
Son · 1940 · age 21 · b. ~1919 · Iowa
★ You are viewing this record
Sibling
Doloris Carlson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Carlson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Carlson
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 — Webster-County, Iowa
Open full size
1940 US Federal Census — Webster-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01212-01109)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George G. Johnson | 54 | Head | Painter | Iowa |
| 42 | Alice J. Johnson | 47 | Wife | — | Iowa |
| 43 | Bernice E. Johnson | 26 | Daughter | Bookkeeping | Iowa |
| 44 | Russell G. Johnson | 21 | Son | Meat Cutter | Iowa |
| 45 | Anton E. Carlson | 51 | Head | — | Sweden |
| 46 | Victoria E. Carlson | 48 | Wife | — | Sweden |
| 47 | John H. Carlson THIS PERSON | 21 | Son | — | Iowa |
| 48 | Dorothy E. Carlson | 18 | Daughter | — | Iowa |
| 49 | Doris J. Carlson | 16 | Daughter | Operator | Iowa |
| 50 | Doloris G. Carlson | 16 | Daughter | — | Iowa |
| 51 | Henry M. Dahl | 61 | Head | Tailor | Iowa |
| 52 | Ida J. Dahl | 67 | Wife | — | Iowa |
| 53 | Astrid M. Olson | 49 | Sister-in-law | — | Nebraska |
| 54 | Gordon Schwendemann | 29 | Head | Radio Man | Iowa |
| 55 | Hilda B. Schwendemann | 33 | Wife | Saleslady | Iowa |
| 56 | Hugo E. Potratz | 24 | Head | Laborer | Iowa |
| 57 | Elma A. Potratz | 24 | Wife | Laborer | Iowa |
| 58 | Frank Olson | 40 | Head | Engineer | Iowa |
| 59 | Melva R. Olson | 39 | Wife | — | Iowa |
| 60 | Robert E. Olson | 10 | Son | — | Iowa |
| 61 | Russell L. Olson | 8 | Son | — | Iowa |
| 62 | Bernard D. Olson | 5 | Son | — | Iowa |
| 63 | Richard L. Green | 80 | Head | — | Illinois |
| 64 | Andrew M. Pruess | 44 | Daughter | — | Iowa |
| 65 | Evelyn L. Pruess | 18 | Daughter | Servant | Iowa |
| 66 | Eugene W. Pruess | 14 | Son | — | Iowa |
| 67 | Nancy L. Pruess | 8 | Daughter | — | Iowa |
| 68 | Glenn D. Fowler | 28 | Head | Inspector | Iowa |
| 69 | Grace S. Fowler | 21 | Wife | — | Iowa |
| 70 | Nancy Lou Fowler | 0 | Daughter | — | Iowa |
| 71 | Roy G. Anderson | 37 | Head | Miner | Iowa |
| 72 | Emma O. Anderson | 61 | Mother | — | Iowa |
| 73 | Charles P. Anderson | 63 | Father | Laborer | Iowa |
| 74 | Leonard J. Anderson | 34 | Brother | Carpenter | Iowa |
| 75 | Vindel L. Anderson | 24 | Brother | Mechanic | Iowa |
| 76 | Gail S. Anderson | 22 | Brother | Butcher | Iowa |
| 77 | Frank O. Anderson | 21 | Brother | Salesman | Iowa |
| 78 | Charlotte M. Anderson | 19 | Sister | Servant | Iowa |
| 79 | Clarence R. Olson | 36 | Head | Manager | Iowa |
| 80 | Mary E. Olson | 35 | Wife | Stenographer | Iowa |
Pedigree Summary
John + 3 siblings
Gen 1 · 2 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)