HC
Harry Collins — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Harry Collins across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1898), then head of a 8-person household.
Age 42
b. ~1898
Male
Head
Born: Nebraska
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Collins |
| Given Name | Harry A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | Des Moines city |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Medical Doctor |
| Industry | Private Practice |
| Class of Worker | OA |
| Hours Worked | 32 |
| Income (1939) | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same Place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Occupation | Medical Doctor |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1898 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harry | Age | Birth yr |
|---|---|---|---|---|
| Robert Collins | Son | — | 12 | ~1928 |
| Mary Collins | Daughter | — | 8 | ~1932 |
| Ruth Collins | Daughter | — | 5 | ~1935 |
| Esther Collins | Spouse | — | 34 | ~1906 |
| Lorraine Develine | Other | — | 39 | ~1901 |
| Dorothy Collins | Daughter | — | 11 | ~1929 |
| Harry Collins | Head | — | 42 | ~1898 |
| Harry Collins | Son | — | 4 | ~1936 |
Census Appearances
1930
Polk, Iowa
Head, age 32
Polk, Iowa · implied b. ~1898 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Collins |
| Given Name | Harry A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Nebraska |
| Age at First Marriage | 29 |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Ireland |
| Occupation | Physician |
| Industry | Gastro-Enterology |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 100 |
| Radio Set | R |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
Polk-County, Iowa
Head, age 42
Polk-County, Iowa · implied b. ~1898 — 8 household members
| Surname | Collins |
| Given Name | Harry A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | Des Moines city |
| 1935 Residence (County) | Polk |
| Occupation | Medical Doctor |
| Industry | Private Practice |
| Class of Worker | OA |
| Hours Worked | 32 |
| Income (1939) | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same Place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Harry Collins across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Harry Collins
Head · 1940 · age 42 · b. ~1898 · 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
35 people indexed on this census page (nara:1940:m-t0627-01193-00812)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Donna Dickinson | 17 | Housekeeper | Housekeeper | Iowa |
| 42 | William Arthur Lamb | 23 | Head | Editor & Publisher | Iowa |
| 43 | Elizabeth Lamb | 25 | Wife | Assistant Editor | Tennessee |
| 44 | Alice C. Waitz | 67 | Head | — | Illinois |
| 45 | Elsa Jane Waitz | 25 | Daughter | Office Worker | Iowa |
| 46 | Elizabeth Kelly | 25 | Lodger | Clerk | Iowa |
| 47 | — | None | — | — | — |
| 48 | Marjorie Weiner | 20 | Housekeeper | Housekeeper | N. Dakota |
| 49 | George W. Koss | 61 | Head | — | Iowa |
| 50 | Koss | None | Wife | — | — |
| 51 | Helen E. Johnson | 23 | Housekeeper | Housekeeper | Iowa |
| 52 | Harry A. Collins THIS PERSON | 42 | Head | Medical Doctor | Nebraska |
| 53 | Esther Collins | 34 | Wife | — | Massachusetts |
| 54 | Robert Collins | 12 | Son | — | Iowa |
| 55 | Dorothy Collins | 11 | Daughter | — | Iowa |
| 56 | Mary Collins | 8 | Daughter | — | Iowa |
| 57 | Ruth Collins | 5 | Daughter | — | Iowa |
| 58 | Harry Collins | 4 | Son | — | Iowa |
| 59 | Lorraine Develine | 39 | Housekeeper | Housekeeper | Iowa |
| 60 | Schmitz | None | Head | — | — |
| 61 | — | None | — | — | — |
| 62 | — | None | — | — | — |
| 63 | — | None | — | — | — |
| 64 | T. C. Denny | 52 | Head | — | Missouri |
| 65 | Alice Denny | 23 | Daughter | Stenographer | Iowa |
| 66 | Ralph Denny | 21 | Son | — | Iowa |
| 67 | Kate Tyler | 59 | Housekeeper | Housekeeper | Iowa |
| 68 | Norman W. Hargrove | 59 | Head | Sales Executive | Canada |
| 69 | Maude B. Hargrove | 58 | Wife | — | Canada |
| 70 | Thomas Patterson | 89 | Father-in-law | — | Scotland |
| 71 | Addison Parker | 61 | Head | Lawyer | Iowa |
| 72 | Ida L. Parker | 54 | Wife | Housewife | Michigan |
| 73 | Jane Day Parker | 21 | Daughter | — | Iowa |
| 74 | Paul D. Parker | 18 | Son | — | Iowa |
| 75 | Hugh C. Parker | 16 | Son | — | Iowa |
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)