MM
Mary Montgomery — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this Mary Montgomery across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 5-person household.
Age 56
b. ~1884
Female
Head
Born: Illinois
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Montgomery |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Springfield City |
| Est. Birth Year | ~1884 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Webbs | Daughter | — | 20 | ~1920 |
| Mary Montgomery | Head | — | 56 | ~1884 |
| L Mitchell | Other | — | 34 | ~1906 |
| G Dilbaitis | Other | — | 30 | ~1910 |
| John Monaghan | Other | — | 37 | ~1903 |
Census Appearances
1920
Sangamon, Illinois
Spouse, age 36
Sangamon, Illinois · implied b. ~1884 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Spouse, age 46
Sangamon, Illinois · implied b. ~1884 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 19 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Head, age 56
Sangamon-County, Illinois · implied b. ~1884 — 5 household members
| Surname | Montgomery |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 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 Montgomery across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Montgomery
Head · 1940 · age 56 · b. ~1884 · Illinois
★ You are viewing this record
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
33 people indexed on this census page (nara:1940:m-t0627-00884-00526)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Leather Pearl Leather | 24 | Wife | — | Illinois |
| 42 | William D. Willhite | 78 | Head | — | Illinois |
| 43 | Anna Willhite | 67 | Wife | — | Illinois |
| 44 | Richard Mays | 28 | Lodger | Truck Driver | Illinois |
| 45 | Raymond Leite | 26 | Lodger | Carpenter | Illinois |
| 46 | Charles A. Rampel | 53 | Head | — | Illinois |
| 47 | Ruby Hammond | 43 | Lodger | Cook | Illinois |
| 48 | William Crawford | 48 | Head | Truck Driver | Kentucky |
| 49 | Carl De Pace | 38 | Head | Construction | Norway |
| 50 | Lester Prometer | 37 | Head | Laborer | Illinois |
| 51 | Robert Hughes | 70 | Head | — | Illinois |
| 52 | Dora Hughes | 57 | Wife | — | Illinois |
| 53 | Thelma Riley | 38 | Head | — | Illinois |
| 54 | Gale Hartell | 19 | Daughter | Laborer | Illinois |
| 55 | Betty Hartell | 14 | Daughter | — | Illinois |
| 56 | George De Freitas | 30 | Lodger | Cab Driver | Illinois |
| 57 | Mary Montgomery THIS PERSON | 56 | Head | — | Illinois |
| 58 | Mary Webbs | 20 | Daughter | — | Illinois |
| 59 | G. Dilbaitis | 30 | Lodger | Laborer | Illinois |
| 60 | John Monaghan | 37 | Lodger | Miner | Italy |
| 61 | L. C. Mitchell | 34 | Lodger | Piano Tuner | Oklahoma |
| 62 | Marshall Stalie | 54 | Head | Car Repairman | Kentucky |
| 63 | Luke Stalie | 24 | Son | Butcher | Kentucky |
| 64 | Melvin Franks | 46 | Head | Salesman | Illinois |
| 65 | Charles Smith | 77 | Head | Cement Mixer | Illinois |
| 66 | Minnie Smith | 37 | Wife | — | Colorado |
| 67 | Earl Arlington | 42 | Head | Entertainer | Indiana |
| 68 | Lois Arlington | 26 | Wife | Entertainer | Iowa |
| 69 | Wayne Lane | 36 | Lodger | Salesman | Illinois |
| 70 | Patricia Ryan | 22 | Lodger | Entertainer | Illinois |
| 71 | James P. Waterfield | 31 | Head | Operator | Kentucky |
| 72 | Kathryn Waterfield | 29 | Wife | — | Missouri |
| 73 | Charles Rapp | 54 | Head | Car Repairman | 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)