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Margaret Mcgrath — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Margaret Mcgrath across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents Ralph & Roger — first a daughter (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | McGrath |
| Given Name | Margaret L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | 2nd Magisterial District |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Stenographer |
| Township / Ward | 2Nd Magisterial District |
| Est. Birth Year | ~1910 |
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 |
|---|---|---|---|---|
| Ella Mcgrath | Daughter | — | 34 | ~1906 |
| Roger Mcgrath | Head | — | 71 | ~1869 |
| Margaret Mcgrath | Daughter | — | 30 | ~1910 |
Census Appearances
1920
Jefferson, Kentucky
Daughter, age 9
Jefferson, Kentucky · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Daughter, age 20
Jefferson, Kentucky · implied b. ~1910 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Stenographer |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Daughter, age 30
Jefferson-County, Kentucky · implied b. ~1910 — 3 household members
| Surname | McGrath |
| Given Name | Margaret L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | 2nd Magisterial District |
| 1935 Residence (County) | Jefferson |
| Occupation | Stenographer |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Ralph Mcgrath (~0.92 confidence) and father Roger Mcgrath (~0.92 confidence) and mother Bella Mcgrath (~0.92 confidence) and father Rodger Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ralph Mcgrath
b. ~1868
Source father
● Household
· direct · ~0.92
Father
Roger Mcgrath
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Bella Mcgrath
b. ~1871
Source mother
● Household
· direct · ~0.92
Father
Rodger Mcgrath
b. ~1878
Source father
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mcgrath
Daughter · 1940 · age 30 · b. ~1910 · Kentucky
★ You are viewing this record
Sibling
Ella Mcgrath
Sibling · 1940 · age 34
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 — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01320-00703)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Pauline Miller | 10 | Daughter | — | Kentucky |
| 42 | Katie Miller | 69 | Mother | — | Kentucky |
| 43 | Ollie M. Paris | 61 | Head | Farm Laborer | Kentucky |
| 44 | Ellen D. Paris | 53 | Wife | — | Kentucky |
| 45 | Leslie D. Paris | 26 | Son | Chauffeur | Kentucky |
| 46 | Laura L. Paris | 13 | Daughter | — | Kentucky |
| 47 | Pauline H. Snyder | 46 | Head | Asst Manager | Kentucky |
| 48 | Betty K. Snyder | 18 | Daughter | Saleslady | Michigan |
| 49 | Helen H. Snyder | 15 | Daughter | — | Kentucky |
| 50 | Anna B. Snyder | 12 | Daughter | — | Kentucky |
| 51 | Fred J. Deckmann | 37 | Head | Electrician | Kentucky |
| 52 | Lena Deckmann | 37 | Wife | — | Kentucky |
| 53 | George P. Deckmann | 5 | Son | — | Kentucky |
| 54 | Fred L. Deckmann | 3 | Son | — | Kentucky |
| 55 | George Deckmann | 71 | Head | — | Germany |
| 56 | Hattie E. Strohman | 68 | Head | — | Kentucky |
| 57 | Hazel Bohmer | 44 | Sister | Mail Order Clerk | Kentucky |
| 58 | Julius Brohm | 72 | Head | Farmer | Germany |
| 59 | Theresa Brohm | 62 | Wife | — | Kentucky |
| 60 | Constance Brohm | 29 | Daughter | — | Kentucky |
| 61 | Robert E. Ragland | 74 | Head | — | Kentucky |
| 62 | Effie C. Ragland | 60 | Wife | — | Kentucky |
| 63 | Joel D. Ragland | 29 | Lodger | Agent | Ohio |
| 64 | Roger G. Mcgrath | 71 | Head | Deputy Clerk | Kentucky |
| 65 | Ella C. Mcgrath | 34 | Daughter | Typist | Kentucky |
| 66 | Margaret L. Mcgrath THIS PERSON | 30 | Daughter | Stenographer | Kentucky |
| 67 | Fred J. Newton | 58 | Head | Farmer | Kentucky |
| 68 | Anna M. Newton | 53 | Wife | — | Kentucky |
| 69 | Margaret E. Newton | 32 | Daughter | — | Kentucky |
| 70 | Wilma F. Newton | 30 | Daughter | Trained Nurse | Kentucky |
| 71 | Henry E. Newton | 20 | Son | Farm Laborer | Kentucky |
| 72 | Francis Jr. Newton | 18 | Son | Farm Laborer | Kentucky |
| 73 | Mary A. Newton | 15 | Daughter | — | Kentucky |
| 74 | Robert S. Newton | 13 | Son | — | Kentucky |
| 75 | Vincent D. Newton | 10 | Son | — | Kentucky |
| 76 | Lawrence Fisher | 25 | Head | Farm Laborer | Kentucky |
| 77 | Leo Fisher | 25 | Brother | Farm Laborer | Kentucky |
| 78 | James B. Mohr | 50 | Head | — | Kentucky |
| 79 | Sophia Mohr | 51 | Wife | — | Kentucky |
| 80 | Jessie W. Jones | 41 | Son in law | Contractor | Kentucky |
Pedigree Summary
Margaret + 1 sibling
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)