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John Dolan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Dolan across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 7-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Dolan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Felt Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 350 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Bookkeeper |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Robert Dolan | Son | — | 15 | ~1925 |
| Margaret Dolan | Daughter | — | 10 | ~1930 |
| James Dolan | Son | — | 21 | ~1919 |
| Mary Dolan | Spouse | — | 48 | ~1892 |
| John Dolan | Son | — | 22 | ~1918 |
| Francis Dolan | Son | — | 18 | ~1922 |
| James Dolan | Head | — | 50 | ~1890 |
Census Appearances
1930
Cook, Illinois
Son, age 13
Cook, Illinois · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dolan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 7 household members
| Surname | Dolan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Bookkeeper |
| Industry | Felt Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 350 |
| Highest Grade | H-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 John Dolan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Dolan
Son · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
James Dolan
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Dolan
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Dolan
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Dolan
Sibling · 1940 · age 15
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00982-00740)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Barry | 31 | Daughter | Teacher | Illinois |
| 2 | Thomas Barry | 27 | Son | Salesman | Illinois |
| 3 | William Barry | 23 | Son | Freight Handler | Illinois |
| 4 | James Dolan | 50 | Head | Meter-Man | Eire |
| 5 | Mary O Dolan | 48 | Wife | — | Eire |
| 6 | John Dolan THIS PERSON | 22 | Son | Bookkeeper | Illinois |
| 7 | James P Dolan | 21 | Son | Baker | Illinois |
| 8 | Francis Dolan | 18 | Son | — | Illinois |
| 9 | Robert Dolan | 15 | Son | — | Illinois |
| 10 | Margaret Dolan | 10 | Daughter | — | Illinois |
| 11 | Milton S Woodworth | 39 | Head | Driver | Illinois |
| 12 | Kathryn B Woodworth | 36 | Wife | — | Illinois |
| 13 | William Woodworth | 15 | Son | — | Illinois |
| 14 | Nancy Woodworth | 9 | Daughter | — | Illinois |
| 15 | Darwin W Overholt | 66 | Head | — | Illinois |
| 16 | Lydia Overholt | 55 | Wife | — | Missouri |
| 17 | Kenneth Overholt | 28 | Son | Nickel Plater | Missouri |
| 18 | Frank Overholt | 26 | Son | Nickel Plater | Missouri |
| 19 | Wanda Overholt | 24 | Daughter | Stenographer | Missouri |
| 20 | Marian Overholt | 22 | Daughter | Stenographer | Missouri |
| 21 | Joseph Montenegro | 57 | Head | Real Estate Dealer | Italy |
| 22 | Isabel Montenegro | 56 | Wife | — | Illinois |
| 23 | Carmen Montenegro | 25 | Daughter | Stenographer | Illinois |
| 24 | Julia Ferguson | 59 | Head | — | Iowa |
| 25 | Kenneth Ferguson | 39 | Son | Clerk | Illinois |
| 26 | Irene Ferguson | 31 | Daughter | — | Illinois |
| 27 | Stella Turek | 38 | Head | Teacher | Illinois |
| 28 | Mary Turek | 66 | Sister | — | Illinois |
| 29 | Louise Turek | 46 | Sister | — | Illinois |
| 30 | Blanche Turek | 41 | Sister | Machine Operator | Nebraska |
| 31 | Daniel Turek | 60 | Brother | — | Illinois |
| 32 | Frank V Chinlund | 56 | Head | Clerk | Sweden |
| 33 | Evelyn Chinlund | 48 | Wife | — | Illinois |
| 34 | Kathryn Chinlund | 15 | Daughter | — | Illinois |
| 35 | Edward Ford | 70 | Head | Chef | Missouri |
| 36 | Mary Jane Ford | 59 | Wife | — | Missouri |
| 37 | Helen Pomeroy | 55 | Lodger | Clerk | Missouri |
| 38 | Helen Daughter | 38 | Lodger | Salesgirl | Illinois |
| 39 | James Byrne | 32 | Head | Laborer | Eire |
| 40 | Catherine Byrne | 32 | Wife | — | Eire |
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)