HC
Helen Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Linn-County, Iowa
Our Model Tree links this Helen Clark across the 1920, 1930 and 1940 US Censuses in Linn-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1887), then head of a 5-person household.
Age 53
b. ~1887
Female
Head
Born: Iowa
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Linn-County, Iowa |
| Surname | Clark |
| Given Name | Helen M. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Cedar Rapids |
| Est. Birth Year | ~1887 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Clark | Daughter | — | 22 | ~1918 |
| Helen Clark | Head | — | 53 | ~1887 |
| Sara Clark | Other | — | 1 | ~1939 |
| Helen Clark | Other | — | 25 | ~1915 |
| James Clark | Son | — | 27 | ~1913 |
Census Appearances
1920
Linn, Iowa
Spouse, age 33
Linn, Iowa · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Helen S |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Linn, Iowa
Spouse, age 43
Linn, Iowa · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Helen S. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 25 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Linn-County, Iowa
Head, age 53
Linn-County, Iowa · implied b. ~1887 — 5 household members
| Surname | Clark |
| Given Name | Helen M. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Income (1939) | 0 |
| Highest Grade | No 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 Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Helen Clark
Head · 1940 · age 53 · b. ~1887 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Linn-County, Iowa
Open full size
1940 US Federal Census — Linn-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01176-00196)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edith S. Duren | 77 | Head | — | Iowa |
| 2 | Jennie Little | 62 | Sister | Partner | Iowa |
| 3 | Don C. Lasky | 63 | Roomer | Agent | Ill. |
| 4 | Helen M. Clark THIS PERSON | 53 | Head | — | Iowa |
| 5 | Elizabeth Clark | 22 | Daughter | — | Iowa |
| 6 | James S. Clark | 27 | Son | Lieutenant J.G. | Iowa |
| 7 | Helen A. Clark | 25 | Daughter-in-law | — | Penn. |
| 8 | Sara Helen Clark | 1 | Granddaughter | — | Conn. |
| 9 | Clair Marshall | 47 | Head | Treasurer | Iowa |
| 10 | Myrna Marshall | 45 | Wife | — | Iowa |
| 11 | Hal Marshall | 15 | Son | — | Iowa |
| 12 | Diane Marshall | 8 | Daughter | — | Iowa |
| 13 | Thomas Marshall | 6 | Son | — | Iowa |
| 14 | Florence Bena | 16 | Servant | Maid | Iowa |
| 15 | Katherine Ford | 45 | Head | — | Iowa |
| 16 | Robert M. Ford | 17 | Son | — | Iowa |
| 17 | Elizabeth Ford | 15 | Daughter | — | Iowa |
| 18 | Rita Mills | 24 | Maid | Maid | Iowa |
| 19 | Joe L. Konecny | 52 | Head | Proprietor | Iowa |
| 20 | Anna Konecny | 41 | Wife | — | Iowa |
| 21 | L. Valena Konecny | 22 | Daughter | Clerk | Iowa |
| 22 | Allayne Konecny | 19 | Daughter | Clerk | Iowa |
| 23 | Henry Rustine | 52 | Head | Owner | Iowa |
| 24 | Gertrude Rustine | 40 | Wife | — | So. Dak. |
| 25 | Mary Ann Rustine | 12 | Daughter | — | Iowa |
| 26 | Katherine Rinehamer | 28 | Servant | Maid | Iowa |
| 27 | Wayne Ives | 55 | Head | Owner | Iowa |
| 28 | Edith Ives | 55 | Wife | — | Iowa |
| 29 | Vivian Ives | 25 | Daughter | Interior Decorator | Iowa |
| 30 | Anton Matyk | 82 | Head | Owner | Czech |
| 31 | William Matyk | 42 | Son | Mgr | Iowa |
| 32 | H. E. Boisen | 49 | Head | Traveling Salesman | Iowa |
| 33 | Lillian Boisen | 46 | Wife | — | Iowa |
| 34 | Dorothy Jane Boisen | 19 | Daughter | — | Iowa |
| 35 | Max Chapman | 71 | Head | Owner | Russia |
| 36 | Irving Baum | 39 | Son-in-law | Clerk | Missouri |
| 37 | Lena Baum | 39 | Daughter | — | Iowa |
| 38 | Herschel Baum | 7 | Grandson | — | Minn. |
| 39 | Marie Schissel | 23 | Servant | Maid | Iowa |
| 40 | Jessie Harrison | 60 | Head | — | Iowa |
Related Census Records
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)