MR
Mary Robertson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this Mary Robertson across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 5-person household.
Age 67
b. ~1873
Female
Head
Born: Illinois
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Robertson |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 67 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Springfield City |
| Est. Birth Year | ~1873 |
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 |
|---|---|---|---|---|
| Jessie Ward | Daughter | — | 40 | ~1900 |
| Mary Robertson | Head | — | 67 | ~1873 |
| Thomas Ward | Other | — | 20 | ~1920 |
| Edward Ward | Other | — | 18 | ~1922 |
| William Robertson | Son | — | 47 | ~1893 |
Census Appearances
1920
Sangamon, Illinois
Spouse, age 47
Sangamon, Illinois · implied b. ~1873 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | England |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Spouse, age 57
Sangamon, Illinois · implied b. ~1873 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson |
| Given Name | Mary A. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 18 |
| Father's Birthplace | England |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Head, age 67
Sangamon-County, Illinois · implied b. ~1873 — 5 household members
| Surname | Robertson |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 67 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 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 Robertson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Robertson
Head · 1940 · age 67 · b. ~1873 · 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
38 people indexed on this census page (nara:1940:m-t0627-00885-00309)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Andrew Mclaughlin | 23 | Head | Machinist | Canada English |
| 2 | Ruby Mclaughlin | 19 | Wife | — | Illinois |
| 3 | Mary Mclaughlin | 58 | Head | — | Illinois |
| 4 | Charles Walden | 72 | Head | — | Illinois |
| 5 | Mary Robertson THIS PERSON | 67 | Head | — | Illinois |
| 6 | William Robertson | 47 | Son | — | Illinois |
| 7 | Jessie Ward | 40 | Daughter | Housework | Illinois |
| 8 | Thomas Ward | 20 | Grandson | Laborer | Illinois |
| 9 | Edward Ward | 18 | Grandson | Painter | Illinois |
| 10 | Fred Robertson | 26 | Head | Truck Driver | Illinois |
| 11 | Thelma Robertson | 28 | Wife | — | Illinois |
| 12 | Samuel Miller | 74 | Head | — | Illinois |
| 13 | Lithia Miller | 65 | Wife | — | Illinois |
| 14 | Nelia Emery | 72 | Head | — | Tennessee |
| 15 | Clifford Emery | 29 | Head | Laborer | Illinois |
| 16 | Mildred Emery | 22 | Wife | — | Illinois |
| 17 | Helen Emery | 4 | Daughter | — | Illinois |
| 18 | Fred O. Rhodes | 65 | Head | Miner | Iowa |
| 19 | Jenny Rhodes | 61 | Wife | — | Iowa |
| 20 | Harley Rhodes | 38 | Head | Miner | Iowa |
| 21 | Mildred Rhodes | 37 | Wife | — | Missouri |
| 22 | Gilbert Rhodes | 9 | Son | — | Illinois |
| 23 | Robert Rhodes | 5 | Son | — | Illinois |
| 24 | Joseph Proctor | 31 | Head | Laborer | Illinois |
| 25 | Anna Proctor | 28 | Wife | — | Illinois |
| 26 | Norma Proctor | 7 | Daughter | — | Illinois |
| 27 | William Proctor | 2 | Son | — | Illinois |
| 28 | Harry Roberts | 36 | Head | Mechanic | Illinois |
| 29 | Veda Roberts | 31 | Wife | — | Illinois |
| 30 | Harry Roberts | 12 | Son | — | Illinois |
| 31 | Kenneth Roberts | 10 | Son | — | Illinois |
| 32 | Barbara Roberts | 7 | Daughter | — | Illinois |
| 33 | Robert Rape | 39 | Head | Laborer | Illinois |
| 34 | Etta O. Rape | 36 | Wife | — | Illinois |
| 35 | Noris Rape | 17 | Daughter | — | Illinois |
| 36 | Florene Rape | 15 | Daughter | — | Illinois |
| 37 | Effie Rape | 77 | Mother | — | Ohio |
| 38 | Martha Franklin | 69 | Head | — | Connecticut |
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)