HC
Helen Carlson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Helen Carlson across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 4-person household.
Age 52
b. ~1888
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Carlson |
| Given Name | Helen O. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1888 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Eskil Carlson | Head | — | 55 | ~1885 |
| H Carlson | Daughter | — | 23 | ~1917 |
| Constance Carlson | Daughter | — | 13 | ~1927 |
| Helen Carlson | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Polk, Iowa
Spouse, age 31
Polk, Iowa · implied b. ~1889 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Helen |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Other, age 42
Polk, Iowa · implied b. ~1888 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Helen S. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 27 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Spouse, age 52
Polk-County, Iowa · implied b. ~1888 — 4 household members
| Surname | Carlson |
| Given Name | Helen O. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Highest Grade | H 4 |
| 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 Helen Carlson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Helen Carlson
Spouse · 1940 · age 52 · b. ~1888 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-01193-00683)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 42 | Eskil G. Carlson | 55 | Head | Lawyer | Iowa |
| 43 | Helen O. Carlson THIS PERSON | 52 | Wife | — | Iowa |
| 44 | H. Christine Carlson | 23 | Daughter | Reporter | Iowa |
| 45 | Constance A. Carlson | 13 | Daughter | — | Iowa |
| 46 | Ernest G. Westberg | 47 | Head | Executive | Illinois |
| 47 | Ruth M. Westberg | 46 | Wife | — | Illinois |
| 48 | Ruth C. Westberg | 23 | Daughter | Reporter | Illinois |
| 49 | Grover R. Westberg | 11 | Son | — | Iowa |
| 51 | Frederick M. Morrison | 38 | Head | Banker | Iowa |
| 52 | Lucile F. Morrison | 37 | Wife | — | Iowa |
| 53 | James B. Morrison | 14 | Son | — | Iowa |
| 54 | Daisy Gailey | 67 | Mother-in-law | — | Iowa |
| 55 | George H. Palmer | 48 | Head | Realtor | Minnesota |
| 56 | Lela M. Palmer | 47 | Wife | — | Iowa |
| 57 | Lucile A. Palmer | 24 | Daughter | Secret Teacher | Iowa |
| 58 | George A. Jr. Palmer | 21 | Son | — | Iowa |
| 59 | Richard B. Palmer | 10 | Son | — | Iowa |
| 60 | Roy S. Kilpatrick | 54 | Head | Own Business | Iowa |
| 61 | Olive F. Kilpatrick | 50 | Wife | — | Iowa |
| 62 | Pauline Hammond | 23 | Servant | House Maid | Iowa |
| 63 | Howard Pierce | 30 | Head | Retail Merchant | Illinois |
| 64 | Marian W. Pierce | 26 | Wife | — | Iowa |
| 65 | Jerome W. Pierce | 4 | Son | — | Iowa |
| 66 | Patricia L. Pierce | 2 | Daughter | — | Iowa |
| 67 | Phillis A. Pierce | 0 | Daughter | — | Iowa |
| 68 | Elsie Germanson | 19 | Servant | House Maid | Iowa |
| 69 | Walter P. Davis | 46 | Head | Mgr. | Kentucky |
| 70 | Marian W. Davis | 37 | Wife | — | Kansas |
| 71 | Walter W. Davis | 15 | Son | — | Kansas |
| 72 | Jack W. Davis | 10 | Son | — | Iowa |
| 73 | Linnie Widner | 55 | Servant | House Maid | Missouri |
| 75 | Ben Starr | 56 | Head | Executive | Illinois |
| 76 | Helen R. Starr | 46 | Wife | — | Illinois |
| 77 | Alan Starr | 8 | Son | — | Iowa |
| 78 | Emma Demuther | 28 | Servant | Servant | Iowa |
| 79 | Oliver S. Buchanan | 41 | Head | Owner | Arkansas |
| 80 | Margaret S. Buchanan | 40 | Wife | — | Arkansas |
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)