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Mary Mcfarland — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Mcfarland across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McFarland |
| Given Name | Mary |
| 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 |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1924 |
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 |
|---|---|---|---|---|
| Frances Mcfarland | Daughter | — | 20 | ~1920 |
| Mary Mcfarland | Spouse | — | 49 | ~1891 |
| Marjorie Mcfarland | Daughter | — | 14 | ~1926 |
| Mary Mcfarland | Daughter | — | 16 | ~1924 |
| Edward Mcfarland | Son | — | 23 | ~1917 |
| Katherine Mcfarland | Daughter | — | 18 | ~1922 |
| Edward Mcfarland | Head | — | 52 | ~1888 |
Census Appearances
1930
Cook, Illinois
Daughter, age 7
Cook, Illinois · implied b. ~1923 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacFarlane |
| Given Name | Mabel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Washington D.C. |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 16
Cook-County, Illinois · implied b. ~1924 — 7 household members
| Surname | McFarland |
| Given Name | Mary |
| 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 |
| Industry | 0 |
| 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 Mcfarland across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcfarland
Daughter · 1940 · age 16 · b. ~1924 · Illinois
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Sibling
Edward Mcfarland
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marjorie Mcfarland
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Mcfarland
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Mcfarland
Sibling · 1940 · age 20
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-t0627-00941-00654)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Carmelita Sister | 27 | — | Teach | No. Dakota |
| 42 | Ima Sister | 21 | — | Teach | Illinois |
| 43 | Vita Sister | 19 | — | Teacher | Illinois |
| 44 | Angelita Sister | 45 | — | Housekeeper | Ohio |
| 45 | Joseph Juraitis | 34 | Head | Janitor | Illinois |
| 46 | Eleanor Juraitis | 30 | Wife | — | Illinois |
| 47 | Bernadine Juraitis | 2 | Daughter | — | Illinois |
| 48 | Clara Szymiawski | 22 | Sister | Filler | Illinois |
| 49 | Alex Klucz | 49 | Head | Circulation Mgr. | Poland |
| 50 | Sophie Klucz | 38 | Wife | — | Illinois |
| 51 | Nathan Al. Klucz | 21 | Son | — | Illinois |
| 52 | Edward Jr. Klucz | 19 | Son | Asst. Machinist | Illinois |
| 53 | Gwendolyn Forman | 14 | Daughter | — | Illinois |
| 54 | Edward Mcfarland | 52 | Head | Supt. Police | Ireland |
| 55 | Mary Mcfarland | 49 | Wife | — | Illinois |
| 56 | Edward Mcfarland | 23 | Son | Shipper | Illinois |
| 57 | Frances Mcfarland | 20 | Daughter | File Clerk | Illinois |
| 58 | Katherine Mcfarland | 18 | Daughter | — | Illinois |
| 59 | Mary Mcfarland THIS PERSON | 16 | Daughter | — | Illinois |
| 60 | Marjorie Mcfarland | 14 | Daughter | — | Illinois |
| 61 | Harry Caswell | 54 | Head | Straightener | Illinois |
| 62 | Edith Caswell | 55 | Wife | — | Wisconsin |
| 63 | Harry Jr. Caswell | 13 | Son | — | Wisconsin |
| 64 | Minnie Mason | 72 | Aunt | — | New York |
| 65 | Homer Devine | 56 | Head | — | Illinois |
| 66 | Mildred Devine | 40 | Wife | Stenographer | Minnesota |
| 67 | Virginia Devine | 17 | Daughter | — | Illinois |
| 68 | Shirley Devine | 14 | Daughter | — | Indiana |
| 69 | Ben Savka | 24 | Head | Third Helper | Illinois |
| 70 | Frances Savka | 21 | Wife | Packer | Illinois |
| 71 | Ralph Nicholson | 23 | Head | Truck Driver | Alabama |
| 72 | Hazel Nicholson | 21 | Wife | — | Alabama |
| 73 | Forest Hanson | 44 | Head | Clerk | Indiana |
| 74 | Doris Hanson | 44 | Wife | — | Indiana |
| 75 | Forest Jr. Hanson | 13 | Son | — | Illinois |
| 76 | Lonnie Hanson | 3 | Son | — | Illinois |
| 77 | Olga Buell | 35 | Head | — | Illinois |
| 78 | Georgianna Buell | 7 | Daughter | — | Illinois |
| 79 | William Harman | 48 | Head | Millwright Foreman | Canada |
| 80 | Mary Harman | 25 | Wife | — | Ohio |
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)