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Mary Dalton — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Dalton across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 9-person household.
Age 18
b. ~1922
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Dalton |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Clerical |
| Industry | Retail Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerical |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1922 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Dalton | Spouse | — | 45 | ~1895 |
| John Dalton | Son | — | 16 | ~1924 |
| James Dalton | Head | — | 47 | ~1893 |
| Catherine Dalton | Daughter | — | 13 | ~1927 |
| Joan Dalton | Daughter | — | 7 | ~1933 |
| Margaret Dalton | Daughter | — | 14 | ~1926 |
| Mary Dalton | Daughter | — | 18 | ~1922 |
| James Dalton | Son | — | 11 | ~1929 |
| Patrick Dalton | Son | — | 2 | ~1938 |
Census Appearances
1930
Cook, Illinois
Daughter, age 7
Cook, Illinois · implied b. ~1923 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dalton |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 18
Cook-County, Illinois · implied b. ~1922 — 9 household members
| Surname | Dalton |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Clerical |
| Industry | Retail Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| 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 Mary Dalton across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dalton
Daughter · 1940 · age 18 · b. ~1922 · Illinois
★ You are viewing this record
Sibling
Patrick Dalton
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Dalton
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Dalton
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Dalton
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Dalton
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Dalton
Sibling · 1940 · age 7
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-t0627-00984-00355)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna Gillespie | 50 | Head | Ticket Agent | Missouri |
| 42 | Florence Gillespie | 24 | Daughter | Clerk | Illinois |
| 43 | John Ferry | 55 | Lodger | Stockman | Illinois |
| 44 | Arnold Charleston | 51 | Head | Carpenter | Minnesota |
| 45 | Judith Charleston | 49 | Wife | — | Sweden |
| 46 | Lillian Charleston | 23 | Daughter | Clerical | Illinois |
| 47 | William Hartman | 63 | Head | Pilot | Illinois |
| 48 | Margaret Navin | 36 | Daughter | Stenog | Illinois |
| 49 | Margaret Navin | 12 | Grand Daughter | — | Illinois |
| 50 | Thomas Navin | 11 | Grand Son | — | Illinois |
| 51 | Eileen Navin | 9 | Grand Daughter | — | Illinois |
| 52 | Ronald Navin | 7 | Grand Son | — | Illinois |
| 53 | Michael Gillespie | 49 | Head | Laborer | Ireland |
| 54 | Anna Gillespie | 50 | Wife | — | Ireland |
| 55 | James Dalton | 47 | Head | Conductor | Ireland |
| 56 | Margaret Dalton | 45 | Wife | — | Ireland |
| 57 | Mary Dalton THIS PERSON | 18 | Daughter | Clerical | Illinois |
| 58 | John Dalton | 16 | Son | — | Illinois |
| 59 | Margaret Dalton | 14 | Daughter | — | Illinois |
| 60 | Catherine Dalton | 13 | Daughter | — | Illinois |
| 61 | James Dalton | 11 | Son | — | Illinois |
| 62 | Joan Dalton | 7 | Daughter | — | Illinois |
| 63 | Patrick Dalton | 2 | Son | — | Illinois |
| 64 | Fred Ackerley | 41 | Head | Press Feeder | England |
| 65 | Myrtle Ackerley | 39 | Wife | — | Illinois |
| 66 | William Ackerley | 15 | Son | Messenger Boy | Illinois |
| 67 | Raymond Baumgarter | 32 | Head | Machinist | Illinois |
| 68 | Laverne Baumgarter | 31 | Wife | — | Illinois |
| 69 | Sharon Baumgarter | 17 | Daughter | Clerical | Illinois |
| 70 | Thomas Culhane | 39 | Head | Platform Man | Ireland |
| 71 | Nellie Culhane | 35 | Wife | — | Ireland |
| 72 | Maurice Culhane | 12 | Son | — | Frisco - 49 |
| 73 | Mary-Lu Culhane | 10 | Daughter | — | Illinois |
| 74 | Thomas Culhane | 5 | Son | — | Illinois |
| 75 | Eleanore Thlen | 50 | Head | — | Sweden |
| 76 | Carl Hanson | 63 | Lodger | House Janitor | Denmark |
| 77 | August Jagan | 61 | Lodger | — | Germany |
| 78 | Frances Mustachio | 52 | Head | — | Italy |
| 79 | Phylliss Mustachio | 39 | Daughter | Machine Operator | New York |
| 80 | Joe Mustachio | 27 | Son | Candy Dipper | New York |
Related Census Records
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)