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Margaret Griffin — 1930 US Census Record
Model Tree available1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Margaret Griffin across the 1910, 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1890), then head of a 4-person household.
Age 40
b. ~1890
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Griffin |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Secretary |
| Industry | Doctors Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Secretary |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1890 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Thomas Talbot | Other | — | 39 | ~1891 |
| John Griffin | Head | — | 77 | ~1853 |
| Elizabeth Griffin | Spouse | — | 70 | ~1860 |
| Margaret Griffin | Daughter | — | 40 | ~1890 |
Census Appearances
1910
Cook, Illinois
Daughter, age 20
Cook, Illinois · implied b. ~1890 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Cook, Illinois
Daughter, age 30
Cook, Illinois · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 40
Cook, Illinois · implied b. ~1890 — 4 household members
| Surname | Griffin |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Secretary |
| Industry | Doctors Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 50
Cook-County, Illinois · implied b. ~1890 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffen |
| Given Name | Margaret |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Secretary |
| Industry | Doctors Office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 236 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Griffin across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Griffin (~0.92 confidence) and father John Griffin (~0.92 confidence) and father John Griffin (~0.92 confidence) and mother Elizabeth Griffin (~0.92 confidence) and mother Lizzie Griffin (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Griffin
b. ~1852
Source father
● Household
· direct · ~0.92
Father
John Griffin
b. ~1854
Source father
● Household
· direct · ~0.92
Father
John Griffin
b. ~1853
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Griffin
b. ~1860
Source mother
● Household
· direct · ~0.92
Mother
Lizzie Griffin
b. ~1860
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Griffin
Daughter · 1930 · age 40 · b. ~1890 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel416:1073)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Earl Eib | 18 | Son | None | Illinois |
| 52 | Margaret Erby | 45 | Cousin | None | Illinois |
| 53 | Edward Lambert | 64 | roomer | Machinist | Canada French |
| 54 | Edward Humphrey | 49 | roomer | Stock Keeper | Illinois |
| 55 | Merrill Taylor | 22 | roomer | Laborer | Illinois |
| 56 | Marian Blaney | 37 | roomer | Office Clerk | Illinois |
| 57 | George Blaney | 13 | roomer | None | Illinois |
| 58 | Hilma Jacobson | 51 | roomer | None | Sweden |
| 59 | Thrift Longfellow | 69 | Head | Agent | Illinois |
| 60 | Michael Longfellow | 61 | Brother | None | Illinois |
| 61 | Charles F. Howe | 65 | roomer | Printer | New York |
| 62 | Herbert Hardy | 23 | roomer | Mechanic | Indiana |
| 63 | Clifford Lynch | 24 | roomer | Painter | Mississippi |
| 64 | Norman Cook | 20 | roomer | Painter | North Dakota |
| 65 | Hugo E. Bauman | 51 | roomer | Chauffeur | Massachusetts |
| 66 | Paul R. Van Raalte | 20 | roomer | Hotel Clerk | Michigan |
| 67 | George R. Longader | 32 | roomer | Waiter | Greece |
| 68 | Sidney Martin | 45 | Head | Traveling Commercial | Illinois |
| 69 | Dorothy Martin | 36 | wife | None | Alabama |
| 70 | Ernesto Tristan | 21 | roomer | None | Peru |
| 71 | Arron Giron | 23 | roomer | None | Guatemala |
| 72 | Bernard Thompson | 22 | roomer | Chauffeur | New York |
| 73 | Miran Inglewitz | 22 | roomer | Chauffeur | New York |
| 74 | Jorge Orellana | 47 | roomer | None | Mexico |
| 75 | Delia Black | 38 | roomer | Welder | Indiana |
| 76 | Victor Webber | 56 | roomer | Elevator | Germany |
| 77 | Kitty Martin | 67 | Rooming House | Housekeeper | Illinois |
| 78 | Patrick Burke | 83 | roomer | Plumber | Irish Free State |
| 79 | Charles H. Fields | 39 | roomer | Chauffeur | Washington |
| 80 | Anson L. O'Rourke | 22 | roomer | Baggage Clerk | Michigan |
| 81 | John Griffin | 77 | Head | None | Illinois |
| 82 | Elizabeth Griffin | 70 | wife | None | Illinois |
| 83 | Margaret Griffin THIS PERSON | 40 | daughter | Secretary | Illinois |
| 84 | Thomas J. Talbot | 39 | roomer | Cashier | Illinois |
| 85 | James Lock | 68 | Head | Janitor | England |
| 86 | Ellen Lock | 43 | wife | None | Irish Free State |
| 87 | James Lock | 17 | son | Stock Clerk | Illinois |
| 88 | William Lock | 15 | son | None | Illinois |
| 89 | Michael Lock | 12 | son | None | Illinois |
| 90 | Joseph Lock | 8 | son | None | Illinois |
| 91 | George Robertson | 45 | Head | Janitor | Scotland |
| 92 | Mary Robertson | 45 | wife | None | Irish Free State |
| 93 | Margaret Robertson | 19 | daughter | Inspector | Illinois |
| 94 | Edward Robertson | 17 | son | File Clerk | Illinois |
| 95 | Mary Robertson | 14 | daughter | None | Illinois |
| 96 | Sam Wilson | 55 | roomer | Janitor | Pennsylvania |
| 97 | Patrick Johnson | 31 | Head | Candy Maker | Illinois |
| 98 | Nora Johnson | 30 | wife | File Clerk | Illinois |
| 99 | George P. Reuter | 43 | roomer | Mechanic | New York |
| 100 | John W. Butler | 30 | roomer | Chauffeur | Illinois |
Pedigree Summary
Margaret
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)