MC
Mary Coffey — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Coffey across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1918), then head of a 9-person household.
Age 12
b. ~1918
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Coffey |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1918 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jennie Coffey | Daughter | — | 10 | ~1920 |
| Loretta Coffey | Daughter | — | 5 | ~1925 |
| Jean Coffey | Daughter | — | 6 | ~1924 |
| Donald Coffey | Son | — | 6 | ~1924 |
| John Coffey | Son | — | 15 | ~1915 |
| Paul Coffey | Son | — | 9 | ~1921 |
| Mary Coffey | Daughter | — | 12 | ~1918 |
| John Coffey | Head | — | 51 | ~1879 |
| Jennie Coffey | Other | — | 43 | ~1887 |
Census Appearances
1930
Cook, Illinois
Daughter, age 12
Cook, Illinois · implied b. ~1918 — 9 household members
| Surname | Coffey |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 21
Cook-County, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coffey |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Industry | Housewife |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 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 Mary Coffey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Coffey
Daughter · 1930 · age 12 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Jean Coffey
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Coffey
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jennie Coffey
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Coffey
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Coffey
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loretta Coffey
Sibling · 1930 · age 5
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
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:illinoiscensus00reel428:0609)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Lillian Schotz | 24 | Daughter | Stenographer | Illinois |
| 52 | Walter Schotz | 21 | Son | Sales Clerk | Illinois |
| 53 | Howard Schotz | 19 | Son | Sales Clerk | Illinois |
| 54 | George Lowers | 45 | Head | Carpenter | Illinois |
| 55 | Emma Lowers | 40 | Wife-H | — | Illinois |
| 56 | George J. Lowers | 15 | Son | — | Illinois |
| 57 | Ernest Lind | 43 | Head | Painter | Illinois |
| 58 | Jane Lind | 40 | Wife-H | — | Sweden |
| 59 | John A. Lind | 16 | Son | Apprentice | Illinois |
| 60 | Alice M. Lind | 15 | Daughter | — | Illinois |
| 61 | Florence Lind | 12 | Daughter | — | Illinois |
| 62 | George Lind | 10 | Son | — | Illinois |
| 63 | George Hagadone | 63 | Head | Embalmer | Illinois |
| 64 | Jennie Hagadone | 54 | Wife-H | — | Michigan |
| 65 | James M. Hagadone | 20 | Son | Office Clerk | Illinois |
| 66 | Charles Garloff | 51 | Lodger | Gunsmith | Illinois |
| 67 | George Burger | 50 | Head | Machinist | Illinois |
| 68 | Alice Burger | 47 | Wife-H | — | Sweden |
| 69 | Clara Burger | 22 | Daughter | Stenographer | Illinois |
| 70 | John Traynick | 58 | Head | Freight Car Repairer | Bohemia |
| 71 | Mary Traynick | 59 | Wife-H | — | Illinois |
| 72 | Catherine Traynick | 20 | Daughter | Office Clerk | Illinois |
| 73 | Arthur Herwynen | 30 | Head | Printer | Illinois |
| 74 | Florence Herwynen | 26 | Wife-H | — | Illinois |
| 75 | Arthur Herwynen | 9 | Son | — | Illinois |
| 76 | June Herwynen | 4 | Daughter | — | Illinois |
| 77 | Thomas J. Ryder | 29 | Head | Mailman | Illinois |
| 78 | Hazel C. Ryder | 30 | Wife-H | — | Illinois |
| 79 | Dorothy A. Ryder | 2 | Daughter | — | Illinois |
| 80 | Marion E. Ryder | 0 | Daughter | — | Illinois |
| 81 | Paul Hennessey | 40 | Bro-in-Law | Laborer | Illinois |
| 82 | Harry E. Hennessey | 32 | Bro-in-Law | Policeman | Illinois |
| 83 | John J. Hennessey | 28 | Bro-in-Law | Cashier | Illinois |
| 84 | William J. Greene | 50 | Head | Manager | Illinois |
| 85 | Sarah E. Greene | 51 | Wife-H | — | Sweden |
| 86 | Martin Rohrbach | 61 | Head | Blacksmith | Germany |
| 87 | Minnie Rohrbach | 50 | Wife-H | — | Germany |
| 88 | Margaret Kupfer | 29 | Daughter | Housemaid | Germany |
| 89 | Richard Kupfer | 9 | Stepson | — | Germany |
| 90 | John J. Coffey | 51 | Head | Freight Man | Irish Free State |
| 91 | Jennie Coffey | 43 | Wife-H | — | Irish Free State |
| 92 | John P. Coffey | 15 | Son | — | Illinois |
| 93 | Mary T. Coffey THIS PERSON | 12 | Daughter | — | Illinois |
| 94 | Jennie Coffey | 10 | Daughter | — | Illinois |
| 95 | Paul F. Coffey | 9 | Son | — | Illinois |
| 96 | Jean M. Coffey | 6 | Daughter | — | Illinois |
| 97 | Donald J. Coffey | 6 | Son | — | Illinois |
| 98 | Loretta Coffey | 5 | Daughter | — | Illinois |
| 99 | Michael J. Wallace | 46 | Head | Foreman | Canada-French |
| 100 | Nellie Wallace | 45 | Wife-H | — | Illinois |
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)