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Margaret Mcgrath — 1940 US Census Record
Model Tree available1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this Margaret Mcgrath across the 1920, 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed), with identified parents Dennis & Sarah — first a daughter (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | McGrath |
| Given Name | Margaret M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport city |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Agrarian Fed. Home Office |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 1040 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Stenographer |
| Township / Ward | Davenport City |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Dennis Mcgrath | Head | — | 69 | ~1871 |
| Sarah Mcgrath | Spouse | — | 67 | ~1873 |
| Margaret Mcgrath | Daughter | — | 29 | ~1911 |
Census Appearances
1920
Scott, Iowa
Daughter, age 8
Scott, Iowa · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Scott, Iowa
Daughter, age 18
Scott, Iowa · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Stenographer |
| Industry | Economy Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Scott-County, Iowa
Daughter, age 29
Scott-County, Iowa · implied b. ~1911 — 3 household members
| Surname | McGrath |
| Given Name | Margaret M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport city |
| 1935 Residence (County) | Scott |
| Occupation | Stenographer |
| Industry | Agrarian Fed. Home Office |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 1040 |
| Highest Grade | Hs 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 Margaret Mcgrath across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Dennis Mcgrath (~0.92 confidence) and mother Sarah Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Dennis Mcgrath
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Sarah Mcgrath
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mcgrath
Daughter · 1940 · age 29 · b. ~1911 · 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 — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01202-00339)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward F. Maxfield | 5 | Son | — | Iowa |
| 42 | Albin S. Kaplan | 50 | Head | Tool Maker | Iowa |
| 43 | Genevieve G. Kaplan | 43 | Wife | — | Iowa |
| 44 | Warren D. Kaplan | 19 | Son | Metal Polisher | Iowa |
| 45 | Allen D. Kaplan | 12 | Son | — | Iowa |
| 46 | Dennis J. Daugherty | 62 | Head | Laborer | Iowa |
| 47 | Mary E. Lenz | 42 | Daughter | Laundress | Iowa |
| 48 | Rudy Sherman | 45 | Lodger | Painter | Iowa |
| 49 | Thomas C. Dugan | 61 | Head | Wall Paper Hanger | Iowa |
| 50 | Anna M. Dugan | 60 | Wife | — | Germany |
| 51 | Richard T. Dugan | 21 | Son | Packer | Iowa |
| 52 | James E. Dugan | 18 | Son | Truck Driver | Iowa |
| 53 | Dennis J. Mcgrath | 69 | Head | Machine Operator | Iowa |
| 54 | Sarah E. Mcgrath | 67 | Wife | — | Iowa |
| 55 | Margaret M. Mcgrath THIS PERSON | 29 | Daughter | Stenographer | Iowa |
| 56 | John M. Nelson | 63 | Head | Purchasing Agent | Iowa |
| 57 | Alice J. Nelson | 62 | Wife | — | Iowa |
| 58 | Robert C. Nichols | 24 | Head | Sign Painter | Minnesota |
| 59 | Evelyn M. Nichols | 25 | Wife | — | Iowa |
| 60 | Robert C. Jr. Nichols | 5 | Son | — | Iowa |
| 61 | Don Richard Nichols | 4 | Son | — | Iowa |
| 62 | Emma R. Schamel | 65 | Head | — | Iowa |
| 63 | Leroy R. Wade | 49 | Head | Fireman | Iowa |
| 64 | Lillian R. Wade | 52 | Wife | — | Illinois |
| 65 | James B. Farrell | 25 | Head | Salesman | Iowa |
| 66 | Nellie S. Farrell | 27 | Wife | — | Iowa |
| 67 | John E. Farrell | 21 | Brother | Machinist Helper | Iowa |
| 68 | Katherine J. Farrell | 31 | Sister | Stenographer | Iowa |
| 69 | Katherine Mcmahon | 68 | Lodger | — | Iowa |
| 70 | — | None | — | — | — |
| 71 | Thomas P. O'Laughlin | 61 | Head | — | Iowa |
| 72 | Margaret O'Laughlin | 71 | Sister | — | Iowa |
| 73 | John R. O'Laughlin | 59 | Brother | Shipping Clerk | Iowa |
| 74 | Herman Dillinger | 62 | Head | Candy Maker | Iowa |
| 75 | Teresa Dillinger | 64 | Wife | — | Iowa |
| 76 | Erwin T. Dillinger | 39 | Son | Rail Man | Iowa |
| 77 | William O. Finn | 62 | Head | Electrical Engineer | Illinois |
| 78 | Louise M. Finn | 60 | Wife | — | Ohio |
| 79 | Florence Finn | 32 | Daughter | Elevator Operator | Iowa |
| 80 | Glenn E. Steinberg | 41 | Head | Mechanic | Iowa |
Pedigree Summary
Margaret
Gen 1 · 2 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)