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Mary Finn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this Mary Finn across the 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Finn |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | SPRINGFIELD |
| 1935 Residence (County) | SANGAMON |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Springfield |
| Est. Birth Year | ~1927 |
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 |
|---|---|---|---|---|
| Lorrine Finn | Daughter | — | 11 | ~1929 |
| Dulce Finn | Spouse | — | 38 | ~1902 |
| Jane Finn | Daughter | — | 8 | ~1932 |
| Thelma Finn | Daughter | — | 1 | ~1939 |
| Douglas Finn | Son | — | 16 | ~1924 |
| Coleman Finn | Head | — | 43 | ~1897 |
| Thomas Finn | Son | — | 5 | ~1935 |
| Mary Finn | Daughter | — | 13 | ~1927 |
| Dorothy Finn | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Sangamon, Illinois
Daughter, age 3
Sangamon, Illinois · implied b. ~1927 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finn |
| Given Name | Mary H. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Daughter, age 13
Sangamon-County, Illinois · implied b. ~1927 — 9 household members
| Surname | Finn |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | SPRINGFIELD |
| 1935 Residence (County) | SANGAMON |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 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 Finn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Finn
Daughter · 1940 · age 13 · b. ~1927 · Illinois
★ You are viewing this record
Sibling
Dorothy Finn
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Finn
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Finn
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Douglas Finn
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thelma Finn
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorrine Finn
Sibling · 1940 · age 11
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 — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00887-00680)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Peter Boeden | 51 | Head | Farmer | Lithuania |
| 2 | Frances Boeden | 48 | Wife | — | Lithuania |
| 3 | Frances Boeden | 8 | Daughter | — | Illinois |
| 4 | Peter Jr Boeden | 25 | Son | Operator | Illinois |
| 5 | Flavia Boeden | 22 | Daughter-in-law | — | Kansas |
| 7 | Joseph Crawford | 39 | Head | Painter-Paper-Hanger | Kentucky |
| 8 | Nellie Crawford | 30 | Wife | — | Illinois |
| 9 | Ruth Crawford | 11 | Daughter | — | Illinois |
| 10 | William Crawford | 9 | Son | — | Illinois |
| 11 | Virginia Crawford | 6 | Daughter | — | Illinois |
| 12 | Thomas Crawford | 3 | Son | — | Illinois |
| 13 | Dan Maloney | 60 | Head | Miner | Lithuania |
| 14 | Martha Maloney | 50 | Wife | — | Lithuania |
| 15 | Vera Maloney | 28 | Daughter | Maid | Arkansas |
| 16 | Bernice Maloney | 25 | Daughter | Waitress | Illinois |
| 17 | Coleman Finn | 43 | Head | Section Laborer | Kentucky |
| 18 | Dulce Finn | 38 | Wife | — | Kentucky |
| 19 | Dorothy Finn | 17 | Daughter | — | Illinois |
| 20 | Douglas Finn | 16 | Son | — | Illinois |
| 21 | Mary Finn THIS PERSON | 13 | Daughter | — | Illinois |
| 22 | Lorrine Finn | 11 | Daughter | — | Illinois |
| 23 | Jane Finn | 8 | Daughter | — | Illinois |
| 24 | Thomas Finn | 5 | Son | — | Illinois |
| 25 | Thelma Finn | 1 | Daughter | — | Illinois |
| 26 | George Toepfer | 48 | Head | Laborer | Wisconsin |
| 27 | Ivonne Toepfer | 34 | Wife | — | Illinois |
| 28 | Norma Jean Toepfer | 10 | Daughter | — | Illinois |
| 29 | George W. J. Toepfer | 7 | Son | — | Illinois |
| 30 | Charles Freeark | 39 | Head | Gen'L Contractor | Illinois |
| 31 | Maude Freeark | 42 | Wife | — | Illinois |
| 32 | Richard Freeark | 19 | Son | Carpenter'S Apprentice | Indiana |
| 33 | Louis Freeark | 17 | Son | — | Illinois |
| 34 | Harry Freeark | 17 | Son | — | Illinois |
| 35 | Mary M Ingram | 51 | House Keeper | Proprietress House | Ohio |
| 36 | Charles Kinnicutt | 56 | Head | — | Illinois |
| 37 | Alice Kinnicutt | 68 | Wife | — | Illinois |
| 38 | Emerson Porter | 62 | Head | Partner Farmer | Illinois |
| 39 | Frances Porter | 58 | Wife | — | Illinois |
| 40 | Raleigh Kruthaupt | 33 | Son-in-law | Partner Farmer | Illinois |
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)