HJ
Helen James — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Louisa-County, Iowa
Our Model Tree links this Helen James across the 1930 and 1940 US Censuses in Louisa-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 6-person household.
Age 17
b. ~1923
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Louisa-County, Iowa |
| Surname | James |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jefferson Twp. |
| 1935 Residence (County) | Louisa |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Jefferson Twp |
| Est. Birth Year | ~1923 |
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 |
|---|---|---|---|---|
| Helen James | Daughter | — | 17 | ~1923 |
| Minnie James | Spouse | — | 39 | ~1901 |
| Charles James | Head | — | 48 | ~1892 |
| Ronald James | Son | — | 9 | ~1931 |
| Harrie James | Son | — | 15 | ~1925 |
| Barbara James | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Louisa, Iowa
Daughter, age 7
Louisa, Iowa · implied b. ~1923 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | James |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| 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
Louisa-County, Iowa
Daughter, age 17
Louisa-County, Iowa · implied b. ~1923 — 6 household members
| Surname | James |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jefferson Twp. |
| 1935 Residence (County) | Louisa |
| Class of Worker | 0 |
| Highest Grade | H 3 |
| 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 James across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Helen James
Daughter · 1940 · age 17 · b. ~1923 · Iowa
★ You are viewing this record
Sibling
Harrie James
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ronald James
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara James
Sibling · 1940 · age 11
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 — Louisa-County, Iowa
Open full size
1940 US Federal Census — Louisa-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01178-00184)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Danny Adye | 10 | Son | — | Iowa |
| 42 | Gerry Adye | 7 | Son | — | Iowa |
| 43 | Ed G. Smith | 52 | Head | Farmer | Iowa |
| 44 | St. Helen Smith | 52 | Wife | — | Iowa |
| 45 | Olive L. Smith | 76 | Head | — | Iowa |
| 46 | Chester James | 59 | Head | Farmer | Kansas |
| 47 | Walter W. James | 53 | Head | Fisherman | Missouri |
| 48 | Emily M. James | 56 | Wife | — | Iowa |
| 49 | Albert C. Wiley | 66 | Head | Sexton | Iowa |
| 50 | Josie G. Wiley | 59 | Wife | — | Illinois |
| 51 | Floyd E. Noble | 43 | Head | Laborer | Iowa |
| 52 | Lois D. Noble | 32 | Wife | — | Iowa |
| 53 | Rachel Noble | 11 | Daughter | — | Illinois |
| 54 | Donna Noble | 4 | Daughter | — | Iowa |
| 55 | Jennie B. Tomson | 44 | Head | — | Indiana |
| 56 | Perry Wm. Tomson | 20 | Son | Rock Loader | Iowa |
| 57 | Paul L. Tomson | 18 | Son | Laborer | Iowa |
| 58 | Nelly E. Tomson | 15 | Son | — | Iowa |
| 59 | John H. Tomson | 12 | Son | — | Iowa |
| 60 | Paul L. Tomson | 7 | Son | — | Iowa |
| 61 | Edgar A. Matthews | 57 | Head | Log Cutter | Iowa |
| 62 | Hattie M. Crow | 81 | Head | — | Iowa |
| 63 | Sam H. Crow | 50 | Son | Road Maintainer | Iowa |
| 64 | Charles H. James | 48 | Head | Overseer | Iowa |
| 65 | Minnie E. James | 39 | Wife | — | Iowa |
| 66 | Helen James THIS PERSON | 17 | Daughter | — | Iowa |
| 67 | Harrie W. James | 15 | Son | — | Iowa |
| 68 | Barbara James | 11 | Daughter | — | Iowa |
| 69 | Ronald James | 9 | Son | — | Iowa |
| 70 | John H. Oberly | 34 | Head | Clerk | Illinois |
| 71 | Mabel L. Oberly | 24 | Wife | — | Tennessee |
| 72 | Mary E. Oberly | 7 | Daughter | — | Iowa |
| 73 | Henry Oberly | 6 | Son | — | Iowa |
| 74 | John Jr. Oberly | 4 | Son | — | Iowa |
| 75 | Alvin D. Oberly | 3 | Son | — | Iowa |
| 76 | Andy L. Oberly | 1 | Son | — | Iowa |
| 77 | William Gott | 27 | Head | Log Cutter | Missouri |
| 78 | Line Vacant | None | — | — | — |
| 79 | James | None | — | — | — |
| 80 | Joe S. Brown | 65 | Head | Farmer | Ohio |
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)