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Mary Armstrong — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Morgan-County, Illinois
Our Model Tree links this Mary Armstrong across the 1920, 1930 and 1940 US Censuses in Morgan-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1865), then head of a 2-person household.
Age 75
b. ~1865
Female
Head
Born: Kentucky
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Morgan-County, Illinois |
| Surname | Armstrong |
| Given Name | Mary J. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 75 |
| Marital Status | Widowed |
| Birthplace | Kentucky |
| 1935 Residence (City) | Waverly |
| 1935 Residence (County) | Morgan |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Waverly |
| Est. Birth Year | ~1865 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Armstrong | Head | — | 75 | ~1865 |
| Ollie Armstrong | Son | — | 44 | ~1896 |
Census Appearances
1920
Morgan, Illinois
Spouse, age 54
Morgan, Illinois · implied b. ~1866 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Mary J. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Morgan, Illinois
Other, age 64
Morgan, Illinois · implied b. ~1866 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Mary J. |
| Relationship to Head | Mother |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 17 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Morgan-County, Illinois
Head, age 75
Morgan-County, Illinois · implied b. ~1865 — 2 household members
| Surname | Armstrong |
| Given Name | Mary J. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 75 |
| Marital Status | Widowed |
| Birthplace | Kentucky |
| 1935 Residence (City) | Waverly |
| 1935 Residence (County) | Morgan |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Armstrong across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Armstrong
Head · 1940 · age 75 · b. ~1865 · 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 — Morgan-County, Illinois
Open full size
1940 US Federal Census — Morgan-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00861-00975)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gary C. Richardson | 1 | Son | — | Illinois |
| 42 | James A. Watts | 34 | Head | — | Illinois |
| 43 | Junie G. Watts | 26 | Wife | — | Illinois |
| 44 | John R. Brown | 40 | Head | Night Police | Illinois |
| 45 | Letha J. Brown | 40 | Wife | — | Illinois |
| 46 | Jesse R. Brown | 16 | Son | — | Illinois |
| 47 | Robert R. Brown | 14 | Son | — | Illinois |
| 48 | Lawrence W. Brown | 12 | Son | — | Illinois |
| 49 | Mary E. Brown | 8 | Daughter | — | Illinois |
| 50 | Bessie Flood | 50 | Head | Saleslady | Illinois |
| 51 | Connor M. Flood | 23 | Son | State Orderly | Illinois |
| 52 | Paul P. Flood | 19 | Son | Common Labor | Wisconsin |
| 53 | Stella C. Flood | 16 | Daughter | New Worker | Wisconsin |
| 54 | Bernice A. Flood | 15 | Daughter | — | Wisconsin |
| 55 | Regina T. Flood | 14 | Daughter | — | Wisconsin |
| 56 | Thomas B. Flood | 12 | Son | — | Wisconsin |
| 57 | Betty J. Flood | 10 | Daughter | — | Illinois |
| 58 | George W. Miller | 33 | Head | Clerk | Illinois |
| 59 | Opal V. Miller | 34 | Wife | — | Illinois |
| 60 | Mary J. Armstrong | 70 | M-in-law | — | Illinois |
| 61 | Mary J. Armstrong THIS PERSON | 75 | Head | — | Kentucky |
| 62 | Ollie T. Armstrong | 44 | Son | — | Kentucky |
| 63 | — | None | — | — | — |
| 64 | Miles R. Bryan | 35 | Head | Village Carrier | Missouri |
| 65 | Leta L. Bryan | 33 | Wife | — | Illinois |
| 66 | Alma M. Bryan | 19 | Daughter | Typist | Illinois |
| 67 | Martha E. Bryan | 15 | Daughter | — | Illinois |
| 68 | Holland W. Elliott | 54 | Head | Barber | Illinois |
| 69 | Edella B. Elliott | 50 | Wife | — | Illinois |
| 70 | Holland C. Elliott | 21 | Son | Clerk | Illinois |
| 71 | John H. Patterson | 60 | Head | Section Hand | Kentucky |
| 72 | Sarah E. Patterson | 57 | Wife | — | Kentucky |
| 73 | Ora E. Woods | 63 | Head | Saleslady | Illinois |
| 74 | Clara A. Cloud | 74 | Head | — | Illinois |
| 75 | Bessie B. Cloud | 51 | Daughter | Operator | Illinois |
| 76 | Franklin G. Jolly | 78 | Head | Proprietor | Illinois |
| 77 | Louella Jolly | 78 | Wife | — | Illinois |
| 78 | Earl W. Carr | 48 | Head | Farmer | Illinois |
| 79 | Lillie D. Carr | 46 | Wife | — | Illinois |
| 80 | Rita M. Carr | 18 | Daughter | — | 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)