HC
Helen Carlson — 1940 US Census Record
Model Tree available1940 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), with identified parents Charles & Charles — first a daughter (b.~1916), then head of a 6-person household.
Age 24
b. ~1916
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Carlson |
| Given Name | Helen L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Tailor Shop |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 700 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Bookkeeper |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1916 |
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 Helen | Age | Birth yr |
|---|---|---|---|---|
| Judith Slack | Other | — | 1 | ~1939 |
| Terry Slack | Other | — | 3 | ~1937 |
| Helen Carlson | Daughter | — | 24 | ~1916 |
| Gerda Carlson | Spouse | — | 61 | ~1879 |
| Elsie Slack | Daughter | — | 26 | ~1914 |
| Charles Carlson | Head | — | 62 | ~1878 |
Census Appearances
1920
Polk, Iowa
Daughter, age 4
Polk, Iowa · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Mother Tongue | Swedish |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Daughter, age 14
Polk, Iowa · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 24
Polk-County, Iowa · implied b. ~1916 — 6 household members
| Surname | Carlson |
| Given Name | Helen L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Bookkeeper |
| Industry | Tailor Shop |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 700 |
| 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. Identified parents: father Charles Carlson (~0.92 confidence) and father Charles Carlson (~0.92 confidence) and mother Freda Carlson (~0.92 confidence) and mother Gerda Carlson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Carlson
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Charles Carlson
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Freda Carlson
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Gerda Carlson
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Carlson
Daughter · 1940 · age 24 · b. ~1916 · Iowa
★ You are viewing this record
Sibling
Elsie Slack
Sibling · 1940 · age 26
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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01194-00207)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elmer W. Baker | 77 | Head | — | Iowa |
| 2 | Mary Eleanor Pearson | 17 | Grand-daughter | — | Iowa |
| 3 | Francis Blackledge | 61 | Head | Signician | Kansas |
| 4 | Jessie A. Blackledge | 57 | Wife | — | Iowa |
| 5 | Robert O. Blackledge | 19 | Son | — | Iowa |
| 6 | Charles E. Carlson | 62 | Head | Upholster | Iowa |
| 7 | Gerda C. Carlson | 61 | Wife | — | Sweden |
| 8 | Helen L. Carlson THIS PERSON | 24 | Daughter | Bookkeeper | Iowa |
| 9 | Elsie C. Slack | 26 | Daughter | — | Iowa |
| 10 | Terry Kay Slack | 3 | Grand-daughter | — | Iowa |
| 11 | Judith Anne Slack | 1 | Grand-daughter | — | Iowa |
| 12 | Chester C. Blenis | 42 | Head | File-Clerk | Iowa |
| 13 | Mina G. Blenis | 42 | Wife | — | Iowa |
| 14 | Robert C. Blenis | 20 | Son | Usher | Iowa |
| 15 | Gordon L. Blenis | 19 | Son | Usher | Iowa |
| 16 | Ronald D. Blenis | 13 | Son | — | California |
| 17 | Martha M. Fressle | 69 | Mother-in-law | — | Michigan |
| 18 | Bess L. Colgan | 55 | Head | — | Michigan |
| 19 | Helen M. Colgan | 22 | Daughter | Beautician | Iowa |
| 20 | Margaret Green | 80 | Mother | — | Michigan |
| 21 | Frances Porter | 21 | Lodger | Book Keeper | Iowa |
| 22 | Charles E. Kopf | 65 | Head | Archivist | Iowa |
| 23 | Penserozo Kopf | 64 | Wife | — | Iowa |
| 24 | Jack R. Trott | 32 | Head | Frame-Man | Iowa |
| 25 | Estelle F. Trott | 33 | Wife | — | Iowa |
| 26 | Carolyn E. Trott | 4 | Daughter | — | Iowa |
| 27 | Dean G. Parrott | 19 | Lodger | Bookkeeper | Iowa |
| 28 | Sara I. Bingham | 18 | Lodger | Beautician | Iowa |
| 29 | Anna M. Hedges | 49 | Head | Telephone Oper. | Iowa |
| 30 | Gerald T. O'Brien | 26 | Son | Salesman | Iowa |
| 31 | Ray Loughrey | 29 | Lodger | Salesman | Iowa |
| 32 | Glenna Loughrey | 19 | Lodger's Wife | Clerk | Iowa |
| 33 | Mattie M. Smith | 62 | Lodger | Seamstress | Iowa |
| 34 | Burdena J. Drulias | 38 | Head | — | Iowa |
| 35 | George J. Drulias | 10 | Son | — | California |
| 36 | Winifred Foley | 56 | Lodger | Stenographer | Iowa |
| 37 | Rose Elsie De Crow | 44 | Head | Cafeteria-Manager | Kansas |
| 38 | Roger De Crow | 14 | Son | — | Nebraska |
| 39 | Mary Lucas | 25 | Head | Stenographer | Iowa |
| 40 | Alberta Sanders | 23 | Partner | Bookkeeper | Iowa |
Pedigree Summary
Helen + 1 sibling
Gen 1 · 4 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)