MD
Mary Dolan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this Mary Dolan across the 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 7-person household.
Age 17
b. ~1923
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Dolan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Rockford 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Robert Dolan | Son | — | 19 | ~1921 |
| Mabel Dolan | Spouse | — | 42 | ~1898 |
| Donald Dolan | Son | — | 9 | ~1931 |
| Doris Dolan | Daughter | — | 20 | ~1920 |
| Barbara Dolan | Daughter | — | 11 | ~1929 |
| Martin Dolan | Head | — | 42 | ~1898 |
| Mary Dolan | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Winnebago, Illinois
Daughter, age 7
Winnebago, Illinois · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dolan |
| Given Name | Mary H. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Winnebago-County, Illinois
Daughter, age 17
Winnebago-County, Illinois · implied b. ~1923 — 7 household members
| Surname | Dolan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Rockford City |
| 1935 Residence (County) | Winnebago |
| Highest Grade | Hs 3 |
| 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 Dolan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dolan
Daughter · 1940 · age 17 · b. ~1923 · Illinois
★ You are viewing this record
Sibling
Donald Dolan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Dolan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Dolan
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Dolan
Sibling · 1940 · age 19
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 — Winnebago-County, Illinois
Open full size
1940 US Federal Census — Winnebago-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00913-01054)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Maggie Maclaren | 65 | Head | — | Illinois |
| 2 | Cora Baldwin | 84 | Head | — | Wisconsin |
| 3 | Rose Baldwin | 74 | Wife | — | Wisconsin |
| 4 | William Valentine | 50 | Head | Butcher | Wisconsin |
| 5 | Emma Valentine | 42 | Wife | — | Wisconsin |
| 6 | Kenneth Valentine | 19 | Son | Clerk | Wisconsin |
| 7 | Dolores Valentine | 17 | Daughter | — | Wisconsin |
| 8 | Damian Valentine | 13 | Son | — | Illinois |
| 9 | Bernadine Valentine | 12 | Daughter | — | Illinois |
| 10 | Jerome Valentine | 10 | Son | — | Illinois |
| 11 | Martin Dolan | 42 | Head | Dairy | Wisconsin |
| 12 | Mabel Dolan | 42 | Wife | — | Wisconsin |
| 13 | Doris Dolan | 20 | Daughter | New Worker | Illinois |
| 14 | Robert Dolan | 19 | Son | New Worker | Illinois |
| 15 | Mary Dolan THIS PERSON | 17 | Daughter | — | Illinois |
| 16 | Barbara Dolan | 11 | Daughter | — | Illinois |
| 17 | Donald Dolan | 9 | Son | — | Illinois |
| 19 | Winifred Morgan | 42 | Head | Assembler | Illinois |
| 20 | Michael Morgan | 35 | Son | — | Illinois |
| 21 | Martha Morgan | 16 | Daughter | — | Illinois |
| 22 | Daniel Morgan | 11 | Son | — | Illinois |
| 23 | Elmer Lindell | 24 | Head | Laborer | Illinois |
| 24 | Juanita Lindell | 24 | Wife | — | Illinois |
| 25 | Beverly Lindell | 3 | Daughter | — | Illinois |
| 26 | Gerald Lindell | 1 | Son | — | Illinois |
| 27 | Frank Yates | 45 | Head | Garbage Collector | England |
| 28 | Ella Yates | 40 | Wife | — | England |
| 29 | James Yates | 12 | Son | — | Illinois |
| 30 | Betty Yates | 5 | Daughter | — | Illinois |
| 31 | Jerry Yates | 3 | Son | — | Illinois |
| 32 | George Cardy | 33 | Head | Station Attendant | Minnesota |
| 33 | Stella Cardy | 30 | Wife | — | Wisconsin |
| 34 | Betty Cardy | 8 | Daughter | — | Illinois |
| 35 | Bertha Petty | 53 | Mother-in-law | — | Wisconsin |
| 36 | Dean Petty | 14 | Son-in-law | — | Wisconsin |
| 37 | James Petty | 11 | Son-in-law | — | Iowa |
| 38 | George Scott | 46 | Head | Maintenance Man | Pennsylvania |
| 39 | Mary Scott | 43 | Wife | Baker | Pennsylvania |
| 40 | Francis Scott | 25 | Daughter | Baker'S Helper | Pennsylvania |
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)