MK
Mary Kirby — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Kirby across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1882), then head of a 8-person household.
Age 48
b. ~1882
Female
Spouse
Born: Illinois
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Kirby |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1882 |
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 |
|---|---|---|---|---|
| James Kirby | Head | — | 58 | ~1872 |
| Mildred Kirby | Daughter | — | 21 | ~1909 |
| Margaret Kirby | Daughter | — | 23 | ~1907 |
| Dorothy Kirby | Daughter | — | 17 | ~1913 |
| Mary Kirby | Spouse | — | 48 | ~1882 |
| William Kirby | Son | — | 15 | ~1915 |
| John Kirby | Son | — | 25 | ~1905 |
| Mary Kirby | Daughter | — | 10 | ~1920 |
Census Appearances
1930
Cook, Illinois
Spouse, age 48
Cook, Illinois · implied b. ~1882 — 8 household members
| Surname | Kirby |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 59
Cook-County, Illinois · implied b. ~1881 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirby |
| Given Name | Margaret |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Cashier |
| Industry | Restaurant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H-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 Kirby across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kirby
Spouse · 1930 · age 48 · b. ~1882 · 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:illinoiscensus00reel422:0187)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Henry Webb | 53 | Head | Switchman | So Carolina |
| 2 | Mary E Webb | 33 | Wife | — | Arkansas |
| 3 | Walter Jr Mckinley | 29 | Head | Clerk And Cashier | New Mexico |
| 4 | Dorothy E Mckinley | 28 | Wife | — | Illinois |
| 5 | Jean F Mckinley | 5 | Daughter | — | Illinois |
| 6 | Joseph W Jr Mckinley | 4 | Son | — | Illinois |
| 7 | Nancy J Mckinley | 2 | Daughter | — | Illinois |
| 8 | Josephine E Mckinley | 1 | Daughter | — | Illinois |
| 9 | Louis Finkelstein | 75 | Head | — | Russia-Poland |
| 10 | Rebecca Finkelstein | 75 | Wife | — | Russia-Poland |
| 11 | George Finkelstein | 55 | Son | Pharmacist | Russia-Poland |
| 12 | Henry Finkelstein | 17 | Son | — | Illinois |
| 13 | Harold Finkelstein | 13 | Son | — | Illinois |
| 14 | Frank Johnston | 33 | Head | Policeman | Illinois |
| 15 | Laura Johnston | 32 | Wife | — | Iowa |
| 16 | Dorothy Johnston | 12 | Daughter | — | Illinois |
| 17 | Charles Johnston | 9 | Son | — | Illinois |
| 18 | Ida Johnston | 58 | Mother | — | Michigan |
| 19 | Milton Hansen | 37 | Head | Driver | New York |
| 20 | Minnie Hansen | 31 | Wife | — | New York |
| 21 | Bettie Hansen | 12 | Daughter | — | New York |
| 22 | Richard C Porter | 45 | Head | Chauffeur | Illinois |
| 23 | Margaret Porter | 47 | Wife | — | Illinois |
| 24 | Gertrude R Porter | 15 | Daughter | — | Illinois |
| 25 | Mary C Porter | 12 | Daughter | — | Illinois |
| 26 | George Hollander | 37 | Head | Butcher | New York |
| 27 | Christine Hollander | 24 | Wife | — | New York |
| 28 | Edna Hollander | 13 | Daughter | — | Illinois |
| 29 | George Hollander | 12 | Son | — | Illinois |
| 30 | William Hollander | 10 | Son | — | Illinois |
| 31 | Hendrick Brand | 65 | Head | Carpenter | Holland |
| 32 | Jacoba Brand | 66 | Wife | — | Holland |
| 33 | Marie Brand | 16 | Daughter | — | Denmark |
| 34 | Johanna Brown | 27 | Daughter | — | Denmark |
| 35 | Robert B Brown | 5 | Grandson | — | Illinois |
| 36 | Marion M Brown | 3 | Granddaughter | — | Illinois |
| 37 | James F Kirby | 58 | Head | Policeman | Canada-French |
| 38 | Mary A Kirby THIS PERSON | 48 | Wife | — | Illinois |
| 39 | John F Kirby | 25 | Son | — | Illinois |
| 40 | Margaret J Kirby | 23 | Daughter | Teacher | Illinois |
| 41 | Mildred Kirby | 21 | Daughter | Stenographer | Illinois |
| 42 | Dorothy F Kirby | 17 | Daughter | — | Illinois |
| 43 | William Kirby | 15 | Son | — | Illinois |
| 44 | Mary F Kirby | 10 | Daughter | — | Illinois |
| 45 | Bruce E Coy | 28 | Head | Cook | Virginia |
| 46 | Clara Coy | 30 | Wife | — | Missouri |
| 47 | Eldora Coy | 43 | Sister | — | Missouri |
| 48 | Martin Coy | 2 | Son | — | Illinois |
| 49 | Alice F Gordon | 56 | Head-H | — | Illinois |
| 50 | Abe R Bloom | 45 | Head | Grocer | Russia |
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)