MC
Mary Clarke — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Clarke across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 8-person household.
Age 7
b. ~1923
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Clarke |
| Given Name | Mary Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1923 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Marie O'Neill | Other | — | 69 | ~1861 |
| Rose Clarke | Spouse | — | 35 | ~1895 |
| William Clarke | Head | — | 34 | ~1896 |
| Louise Clarke | Daughter | — | 5 | ~1925 |
| Mary Clarke | Daughter | — | 7 | ~1923 |
| William Clarke | Son | — | 10 | ~1920 |
| James Clarke | Son | — | 1 | ~1929 |
| John Clarke | Other | — | 76 | ~1854 |
Census Appearances
1930
Cook, Illinois
Daughter, age 7
Cook, Illinois · implied b. ~1923 — 8 household members
| Surname | Clarke |
| Given Name | Mary Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Can Read/Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 16
Cook-County, Illinois · implied b. ~1924 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Mary Helen |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | Hs 1 |
| 1935 Residence | Same House |
| 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 Clarke across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Clarke
Daughter · 1930 · age 7 · b. ~1923 · Illinois
★ You are viewing this record
Sibling
James Clarke
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Clarke
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Clarke
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:illinoiscensus00reel480:1105)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jane Finnegan | 42 | Head | Investigator | Illinois |
| 2 | Donald Finnegan | 24 | Son | — | Illinois |
| 3 | Kathleen Finnegan | 23 | Daughter | — | Illinois |
| 4 | Maurice Finnegan | 21 | Son | Laborer | Illinois |
| 5 | Robert Finnegan | 11 | Son | — | Illinois |
| 6 | Michael Brodie | 52 | Head | Laborer | Irish Free State |
| 7 | Mary Brodie | 51 | Wife | — | Irish Free State |
| 8 | Francis R Brodie | 24 | Son | Time Keeper | Illinois |
| 9 | Mary Brodie | 22 | Daughter | Bookkeeper | Illinois |
| 10 | Veronica Brodie | 15 | Daughter | — | Illinois |
| 11 | James Brodie | 12 | Son | — | Illinois |
| 12 | Jesse Mcguire | 45 | Head | Manager | Wisconsin |
| 13 | Nettie Mcguire | 39 | Wife | — | Wisconsin |
| 14 | Warren Mcguire | 18 | Son | — | Wisconsin |
| 15 | Minnie Findlay | 64 | Mother-in-law | — | Germany |
| 16 | Henry Klink | 64 | Head | Carpenter | Iowa |
| 17 | Alice Klink | 62 | Wife | — | Illinois |
| 18 | Alice Klink | 31 | Daughter | Stenographer | Illinois |
| 19 | George Barthel | 47 | Head | Butcher | Germany |
| 20 | Isabelle Barthel | 34 | Wife | Saleslady | Germany |
| 21 | Margaret Boehringer | 56 | Mother-in-law | — | Germany |
| 22 | August Boehringer | 30 | Brother-in-law | Tool & Dye Maker | Germany |
| 23 | Henry Boehringer | 23 | Brother-in-law | Baker | Germany |
| 24 | William H Clarke | 34 | Head | Manager | New York |
| 25 | Rose M Clarke | 35 | Wife | — | New York |
| 26 | William Clarke | 10 | Son | — | Illinois |
| 27 | Mary Elizabeth Clarke THIS PERSON | 7 | Daughter | — | Illinois |
| 28 | Louise Clarke | 5 | Daughter | — | Illinois |
| 29 | James J Clarke | 1 | Son | — | Illinois |
| 30 | John S Clarke | 76 | Father | — | Pennsylvania |
| 31 | Marie O'Neill | 69 | Mother-in-law | — | New York |
| 32 | Max Hoppe | 44 | Head | Wood Worker | Illinois |
| 33 | Meta Hoppe | 42 | Wife | — | Illinois |
| 34 | Harold Hoppe | 18 | Son | Errand Boy | Illinois |
| 35 | Matilda Miller | 74 | Mother-in-law | — | Germany |
| 36 | Ohel Archambault | 50 | Head | — | Canada-French |
| 37 | James E Archambault | 26 | Son | Salesman | Rhode Island |
| 38 | Charles Somuty | 52 | Head | Barber | Austria |
| 39 | Ottylia Somuty | 41 | Wife | — | Austria |
| 40 | Hilda Somuty | 18 | Daughter | Stenographer | Illinois |
| 41 | Ruth Somuty | 14 | Daughter | — | Illinois |
| 42 | Clarence Frank | 53 | Head | Repairman | Indiana |
| 43 | Cornelia Frank | 44 | Wife | — | Indiana |
| 44 | Eleanor Frank | 16 | Daughter | — | Illinois |
| 45 | Helen Frank | 12 | Daughter | — | Illinois |
| 46 | Roman F Clarke | 34 | Head | Foreman | Wisconsin |
| 47 | Ruth Clarke | 33 | Wife | — | Wisconsin |
| 48 | Lowell Clarke | 7 | Son | — | Wisconsin |
| 49 | Helen Clarke | 3 | Daughter | — | Wisconsin |
| 50 | Jerry C Murphy | 19 | Boarder | Laborer | Mississippi |
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)