HM
Helen Murphy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Helen Murphy across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Helen & T — first a daughter (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Murphy |
| Given Name | Helen Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Secretary |
| Industry | Equitable Life |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Secretary |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| Helen Murphy | Daughter | — | 23 | ~1917 |
| Helen Murphy | Head | — | 57 | ~1883 |
| William Welch | Other | — | 66 | ~1874 |
| Edmond Murphy | Son | — | 27 | ~1913 |
| George Murphy | Son | — | 25 | ~1915 |
Census Appearances
1920
Polk, Iowa
Daughter, age 3
Polk, Iowa · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Murphy |
| Given Name | Harriet |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Daughter, age 12
Polk, Iowa · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Murphy |
| Given Name | Harriet E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 23
Polk-County, Iowa · implied b. ~1917 — 5 household members
| Surname | Murphy |
| Given Name | Helen Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Secretary |
| Industry | Equitable Life |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Murphy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Helen Murphy (~0.92 confidence) and father T Murphy (~0.92 confidence) and father Robert Murphy (~0.92 confidence) and mother Ethel Murphy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Helen Murphy
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
T Murphy
b. ~1893
Source father
● Household
· direct · ~0.92
Father
Robert Murphy
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Ethel Murphy
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Murphy
Daughter · 1940 · age 23 · b. ~1917 · Iowa
★ You are viewing this record
Sibling
George Murphy
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edmond Murphy
Sibling · 1940 · age 27
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-t0627-01193-00435)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Carl W. Kubec | 14 | Son | — | Iowa |
| 42 | Laura A. Gayre | 36 | Head | — | Iowa |
| 43 | Charles L. Gayre | 64 | Head | Engineer Serv. | Iowa |
| 44 | Ruth O. Gayre | 31 | Daughter | Accountant | Iowa |
| 45 | Carl F. Himmelman | 73 | Head | — | Germany |
| 46 | Elizabeth Himmelman | 56 | Wife | — | Iowa |
| 47 | Carl H. Himmelman | 15 | Son | — | Iowa |
| 48 | William E. Valder | 34 | Lodger | Baker | Nebraska |
| 49 | Stephen Bruce Sutton | 44 | Head | Mechanic | Illinois |
| 50 | Grace W. Sutton | 42 | Wife | — | Iowa |
| 51 | Florence Sanders | 40 | Lodger | Sten. | Iowa |
| 52 | Eleanor Eaton | 25 | Lodger | Clerk | Iowa |
| 53 | Mary Messer | 85 | Head | — | Iowa |
| 54 | Harry F. Messer | 49 | Son | — | Iowa |
| 55 | Geo. F. Hankammer | 63 | Son in Law | Mechanic | Iowa |
| 56 | Clara M. Hankammer | 60 | Daughter | — | Iowa |
| 57 | Orville E. Effenspurger | 40 | Head | Telephone Eng. | Iowa |
| 58 | Stella L. Effenspurger | 40 | Wife | — | Iowa |
| 59 | Charles J. Effenspurger | 13 | Son | — | Iowa |
| 60 | Orville E. Jr. Effenspurger | 2 | Son | — | Iowa |
| 61 | Arlene Larson | 20 | Lodger | Bookkeeper | Iowa |
| 62 | Arthur D. Vorhes | 49 | Head | Salesman | Iowa |
| 63 | Marie A. Vorhes | 42 | Wife | Saleslady | Iowa |
| 64 | Jeanne A. Vorhes | 19 | Daughter | Saleslady | Iowa |
| 65 | Benjamin F. Vorhes | 72 | Father | — | Ohio |
| 66 | Edith A. Vorhes | 83 | Aunt | — | Ohio |
| 67 | Harry E. Graffam | 48 | Head | Salesman | Minnesota |
| 68 | Gladys F. Graffam | 43 | Wife | — | Iowa |
| 69 | Earl H. Graffam | 12 | Son | — | Canada |
| 70 | Nancy J. Graffam | 7 | Daughter | — | Canada |
| 71 | Helen N. Murphy | 57 | Head | Teacher | Iowa |
| 72 | Edmond M. Murphy | 27 | Son | Clerical | Iowa |
| 73 | George N. Murphy | 25 | Son | — | Iowa |
| 74 | Helen Mary Murphy THIS PERSON | 23 | Daughter | Secretary | Iowa |
| 75 | William B. Welch | 66 | Lodger | Cashier | Iowa |
| 76 | Charles F. Leach | 50 | Head | Linotype Op. | Iowa |
| 77 | Frances G. Leach | 50 | Wife | — | Iowa |
| 78 | Helen D. Leach | 21 | Daughter | Salesclerk | Iowa |
| 79 | Cecil O. Darling | 40 | Lodger | Waiter | Iowa |
| 80 | Mary M. Reed | 80 | Head | — | Ohio |
Pedigree Summary
Helen + 2 siblings
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)